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All questions of Algebraic Expressions for Class 7 Exam
What are the coefficients of x in the expression 8 – x + y?
- a)-8
- b)8
- c)-1
- d)1
Correct answer is option 'C'. Can you explain this answer?
What are the coefficients of x in the expression 8 – x + y?
a)
-8
b)
8
c)
-1
d)
1
|
Nandita Krishnan answered |
coefficients of x is the constant with the x which is -1 in this case.
The number of terms in 4p2q − 3pq2 + 5 is- a)3
- b)7
- c)5
- d)1
Correct answer is option 'A'. Can you explain this answer?
The number of terms in 4p2q − 3pq2 + 5 is
a)
3
b)
7
c)
5
d)
1
|
Varun Kapoor answered |
Number of terms means the total number of individual elements present in a statement.
We have 4p2q, 3pq2 and 5 separated by a plus or minus sign, so these three are our terms.
If the value of the expression x2 – 5x + k for x = 0 is 5, then the value of k is
- a)2
- b)5
- c)1
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
If the value of the expression x2 – 5x + k for x = 0 is 5, then the value of k is
a)
2
b)
5
c)
1
d)
None of these
|
Subset Academy answered |
Put value of x in the given expression: (0) - 5 x (0)2 + k = 5 => k = 5
Write an expression: Raju's father's age is 5 years more than 3 times Raju s age. If Raju's age is x years, then his father’s age is
- a)3x – 5
- b)3x + 7
- c)5 – 3x
- d)3x + 5
Correct answer is option 'D'. Can you explain this answer?
Write an expression: Raju's father's age is 5 years more than 3 times Raju s age. If Raju's age is x years, then his father’s age is
a)
3x – 5
b)
3x + 7
c)
5 – 3x
d)
3x + 5
|
Priyanka Sharma answered |
Raju's age is x. Since the father’s age is 3 times Raju's age and 5 more, so three times Raju's age is 3x and 5 more, which means 3x+5.
What is the coefficient of x in the expression y2x + y?
- a)y
- b)y2
- c)1
- d)0
Correct answer is option 'B'. Can you explain this answer?
What is the coefficient of x in the expression y2x + y?
a)
y
b)
y2
c)
1
d)
0
|
Arien Instructors answered |
coefficient is the integral number next to a given variable.
for y, it is -3
The expression for sum of numbers a and b subtracted from their product is
- a)ab – a + b
- b)a + b – ab
- c)ab + a – b
- d)ab – (a + b)
Correct answer is option 'D'. Can you explain this answer?
The expression for sum of numbers a and b subtracted from their product is
a)
ab – a + b
b)
a + b – ab
c)
ab + a – b
d)
ab – (a + b)
|
|
Priyanka Sharma answered |
Sum of numbers is (a+b) , its product is ab and we have to subtract sum from product , so its ab-(a+b)
Which of the following pairs of terms is a pair of unlike terms?
- a) -p2q2,12q2p2
- b)-4yx2,-4xy2
- c)41,100
- d)qp2,13p2q
Correct answer is option 'B'. Can you explain this answer?
Which of the following pairs of terms is a pair of unlike terms?
a)
-p2q2,12q2p2
b)
-4yx2,-4xy2
c)
41,100
d)
qp2,13p2q
|
|
Varun Kapoor answered |
The correct option is B −4yx2,−4xy2
- −p2q2,12q2p2: terms contain same variables with equal exponents, so these are like terms.
- −4yx2,−4xy2: As in −4yx2, x has exponent 2 & y has exponent 1 and in −4xy2 , y has exponent 2 & x has exponent 1. So both the terms have same variables but with different exponent. Hence −4yx2,−4xy2 are unlike terms.
- 41, 100: terms do not contain any variable, so these are like terms.
- qp2,13p2q: terms have same variables p and q with equal exponent 2 and 1 respectively. So, these are like terms.
The sum of mn + 5 – 2 and mn+3 is- a)2mn + 6
- b)mn + 6
- c)2mn – 6
- d)mn – 6
Correct answer is option 'A'. Can you explain this answer?
The sum of mn + 5 – 2 and mn+3 is
a)
2mn + 6
b)
mn + 6
c)
2mn – 6
d)
mn – 6
|
|
Varun Kapoor answered |
mn+5 – 2 + mn + 3 = mn + mn + 5 - 2+3 = 2mn+6
What is the numerical coefficient of y2in the expression 2x2y - 15xy2 + 7y- a)x
- b)5
- c)-15
- d)15x
Correct answer is option 'C'. Can you explain this answer?
What is the numerical coefficient of y2in the expression 2x2y - 15xy2 + 7y
a)
x
b)
5
c)
-15
d)
15x
|
Tutorpedia Coaching answered |
The numerical coefficient is the constant part of the term without the variables. In this case, the numerical coefficient of y2 is -15.
Write the expression for the statement: the sum of three times x and 11.
- a)3x – 11
- b)3x + 11
- c)11 – 3x
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
Write the expression for the statement: the sum of three times x and 11.
a)
3x – 11
b)
3x + 11
c)
11 – 3x
d)
None of these
|
|
Priyanka Sharma answered |
Three times of x is 3 multiplied by x which is 3x . sum of 3x and 11 is 3x plus 11 which is 3x + 11
The coefficient of y3 in the expression y − y3+ y2is- a)-1
- b)2
- c)1
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
The coefficient of y3 in the expression y − y3+ y2is
a)
-1
b)
2
c)
1
d)
None of these
|
|
Priyanka Sharma answered |
Coefficient is the numerical number associated with the variable. So here we have (-1)y3. So the answer is -1.
The expression xyz is- a)binomial
- b)monomial
- c)trinomial
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
The expression xyz is
a)
binomial
b)
monomial
c)
trinomial
d)
None of these
|
Maitri Sarkar answered |
Monomial: An algebraic expression which consists of one non-zero term only is called a monomial.Examples of
Simplify the following: 7xy2 − y2 + 7x2y − 5x2 − 3y2 + 4y2x − 3y2 + x2- a) 11xy2 + 7xy2 − 4x2 − 7y2
- b) 7xy2 − 11xy2 + 4x2 − 7y2
- c) 7x2y + 11xy2 − 4x2 − 7y2
- d) 11xy2 − 7xy2 + 4x2 − 7y2
Correct answer is option 'C'. Can you explain this answer?
Simplify the following: 7xy2 − y2 + 7x2y − 5x2 − 3y2 + 4y2x − 3y2 + x2
a)
11xy2 + 7xy2 − 4x2 − 7y2
b)
7xy2 − 11xy2 + 4x2 − 7y2
c)
7x2y + 11xy2 − 4x2 − 7y2
d)
11xy2 − 7xy2 + 4x2 − 7y2
|
Rainbow Rise Classes answered |
To simplify the expression 7xy2 - y2 + 7x2y - 5x2 - 3y2 + 4y2x - 3y2 + x2, follow these steps:
7xy2 + 4y2x + 7x2y - 5x2 + x2 - 3y2 - y2 - 3y2
- For xy2: (7 + 4)xy2 = 11xy2
- For x2: (1 - 5)x2 = -4x2
- For y2: (-3 - 1 - 3)y2 = -7y2
- For x2: (1 - 5)x2 = -4x2
- For y2: (-3 - 1 - 3)y2 = -7y2
11xy2 + 7x2y - 4x2 - 7y2
- Rearrange the terms:
- Combine like terms:
- Final simplified expression:
Which of the following is the correct expansion of the algebraic identity (a+b)2?- a)a2+2ab+b2
- b)a2+b2
- c)a2−2ab+b2
- d)2a2+2b2
Correct answer is option 'A'. Can you explain this answer?
Which of the following is the correct expansion of the algebraic identity (a+b)2?
a)
a2+2ab+b2
b)
a2+b2
c)
a2−2ab+b2
d)
2a2+2b2
|
Clifford Academy answered |
The algebraic identity (a+b)2 = a2+2ab+b2
Simplify these expressions and find their values, if x = 3, a = – 1, b = – 2.
3x – 5a – x2 + 9b- a)-13
- b)15
- c)13
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
Simplify these expressions and find their values, if x = 3, a = – 1, b = – 2.
3x – 5a – x2 + 9b
3x – 5a – x2 + 9b
a)
-13
b)
15
c)
13
d)
None of these
|
Anita Menon answered |
3x - 5a -x 2 + 9b = 3*3 - 5(-1)-32 + 9 (-2) = 9 + 5 -9 - 18 = 5 - 18 = -13
Simplify combining like terms: 3a – 2b – ab – (a – b + ab) + 3ab + b – a
- a)a - ab
- b)a + ab
- c)a + b
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
Simplify combining like terms: 3a – 2b – ab – (a – b + ab) + 3ab + b – a
a)
a - ab
b)
a + ab
c)
a + b
d)
None of these
|
Pratima shukla answered |
The expression 3a is already simplified and cannot be further simplified.
When terms have the same algebraic factor, they are called __________.- a)like terms
- b)expressions
- c)unlike terms
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
When terms have the same algebraic factor, they are called __________.
a)
like terms
b)
expressions
c)
unlike terms
d)
None of these
|
Vp Classes answered |
- When terms have the same algebraic factor, they are called like terms.
- Like terms have identical variables raised to the same powers, but they may have different coefficients.
- For example, in the expression 3x2 + 5x - 2x2, the terms 3x2 and -2x2 are like terms.
- Like terms have identical variables raised to the same powers, but they may have different coefficients.
- For example, in the expression 3x2 + 5x - 2x2, the terms 3x2 and -2x2 are like terms.
A _________ can take various values.- a)variable
- b)expression
- c)term
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
A _________ can take various values.
a)
variable
b)
expression
c)
term
d)
None of these
|
|
Subset Academy answered |
- A variable is a symbol used to represent a quantity that can change or take on different values.
- In mathematics and programming, variables are placeholders for data that can vary.
- Examples include variables in algebra like x or y, which can represent any number.
- Unlike constants, which have a fixed value, variables are designed to be flexible and adaptable to different situations.
- In mathematics and programming, variables are placeholders for data that can vary.
- Examples include variables in algebra like x or y, which can represent any number.
- Unlike constants, which have a fixed value, variables are designed to be flexible and adaptable to different situations.
The number of terms in the expression 1.2ab – 2.4 b + 3.6a is- a)4
- b)3
- c)2
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
The number of terms in the expression 1.2ab – 2.4 b + 3.6a is
a)
4
b)
3
c)
2
d)
None of these
|
Keystone Instructors answered |
The expression 1.2ab−2.4b+3.6aconsists of three terms:
- 1.2ab
- −2.4b
- 3.6a
Hence, the number of terms in this expression is 3.
The constant term in the expression 1 + x2+ x is
- a)1
- b)x
- c)x2
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
The constant term in the expression 1 + x2+ x is
a)
1
b)
x
c)
x2
d)
None of these
|
Praveen Kumar answered |
The constant term in the expression 1+x²+x is 1.
From the following expressions 10pq, 7p, 8q, −p2q2, -7pq, -23, ab, 3a, b.The like terms are- a)7p, 8q
- b)ab, 3a, b
- c)10pq,-7pq
- d)None of these
Correct answer is option 'C'. Can you explain this answer?
From the following expressions 10pq, 7p, 8q, −p2q2, -7pq, -23, ab, 3a, b.The like terms are
a)
7p, 8q
b)
ab, 3a, b
c)
10pq,-7pq
d)
None of these
|
Freak Artworks answered |
Like terms are those that have the same variable(s) raised to the same power(s).
Here, 10pq and −7pq are like terms because they both contain pq with the same powers of p and q.
Here, 10pq and −7pq are like terms because they both contain pq with the same powers of p and q.
A taxi charges $27 per km and a fixed charge of $45. If the taxi is hired for z km, which of the following is an algebraic expression to find the total fare?- a)27z − 45
- b)27z + 45
- c)45z + 27
- d)45z − 27
Correct answer is option 'B'. Can you explain this answer?
A taxi charges $27 per km and a fixed charge of $45. If the taxi is hired for z km, which of the following is an algebraic expression to find the total fare?
a)
27z − 45
b)
27z + 45
c)
45z + 27
d)
45z − 27
|
Rashi patil answered |
Total Taxi Fare Calculation
To find the total fare for a taxi ride, we need to consider both the variable and fixed components of the fare.
Components of the Fare
- Fixed Charge: This is the base charge that applies regardless of the distance traveled. In this case, it is $45.
- Variable Charge: This charge depends on the distance traveled, which is $27 per kilometer.
Expression for Total Fare
To calculate the total fare when the taxi is hired for 'z' kilometers, we combine both the fixed and variable charges:
- Variable Charge for 'z' km: Since the taxi charges $27 for each kilometer, for 'z' kilometers, the charge would be 27z.
- Total Fare Calculation: The total fare is the sum of the fixed charge and the variable charge:
Total Fare = Fixed Charge + Variable Charge
Total Fare = 45 + 27z
This can be rearranged to:
Total Fare = 27z + 45
Therefore, the correct algebraic expression for the total fare is 27z + 45, which corresponds to option 'B'.
Why Other Options Are Incorrect
- Option A (27z - 45): This incorrectly subtracts the fixed charge from the variable charge.
- Option C (45z + 27): This suggests a charge of $45 for each kilometer, which is incorrect.
- Option D (45z - 27): This again incorrectly combines the charges and does not reflect the correct pricing structure.
Conclusion
Thus, the correct expression to calculate the total taxi fare for 'z' kilometers is 27z + 45.
To find the total fare for a taxi ride, we need to consider both the variable and fixed components of the fare.
Components of the Fare
- Fixed Charge: This is the base charge that applies regardless of the distance traveled. In this case, it is $45.
- Variable Charge: This charge depends on the distance traveled, which is $27 per kilometer.
Expression for Total Fare
To calculate the total fare when the taxi is hired for 'z' kilometers, we combine both the fixed and variable charges:
- Variable Charge for 'z' km: Since the taxi charges $27 for each kilometer, for 'z' kilometers, the charge would be 27z.
- Total Fare Calculation: The total fare is the sum of the fixed charge and the variable charge:
Total Fare = Fixed Charge + Variable Charge
Total Fare = 45 + 27z
This can be rearranged to:
Total Fare = 27z + 45
Therefore, the correct algebraic expression for the total fare is 27z + 45, which corresponds to option 'B'.
Why Other Options Are Incorrect
- Option A (27z - 45): This incorrectly subtracts the fixed charge from the variable charge.
- Option C (45z + 27): This suggests a charge of $45 for each kilometer, which is incorrect.
- Option D (45z - 27): This again incorrectly combines the charges and does not reflect the correct pricing structure.
Conclusion
Thus, the correct expression to calculate the total taxi fare for 'z' kilometers is 27z + 45.
×17
×77Simplify the expression −3(x + y) +5(x − y)- a)2x − 8y
- b)− 2x + 2y
- c)8x − 8y
- d)2x + 8y
Correct answer is option 'A'. Can you explain this answer?
Simplify the expression −3(x + y) +5(x − y)
a)
2x − 8y
b)
− 2x + 2y
c)
8x − 8y
d)
2x + 8y
|
Coachify answered |
To simplify the expression −3(x + y) + 5(x − y), follow these steps:
- Expand the expression:
- Distribute the terms:
- Combine like terms:
−3(x + y) + 5(x − y)
−3x − 3y + 5x − 5y
(−3x + 5x) + (−3y − 5y) = 2x − 8y
Thus, the simplified expression is 2x − 8y.
What is the coefficient of x² in the expression 5/7x²z?- a)5
- b)5/7
- c)z
- d)5/7z
Correct answer is option 'D'. Can you explain this answer?
a)
5
b)
5/7
c)
z
d)
5/7z
|
|
Tutorpedia Coaching answered |
The coefficient of x² in the expression 5/7x²z is 5/7z.
Find the value of x + 4 for x = 2. - a)6
- b)8
- c)4
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
Find the value of x + 4 for x = 2.
a)
6
b)
8
c)
4
d)
None of these
|
|
Kanchan Singh answered |
6 is the correct answer
Simplify these expressions and find their values, if x = 3, a = – 1, b = – 2.
2b – 8x +4x2 + 4a- a)4
- b)6
- c)10
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
Simplify these expressions and find their values, if x = 3, a = – 1, b = – 2.
2b – 8x +4x2 + 4a
2b – 8x +4x2 + 4a
a)
4
b)
6
c)
10
d)
None of these
|
Mrinalini iyer answered |
2b-8x+4x2+4a
=2(-2)-8(3)+ 4(3)2+4(-1)
=-4-24+36-4
=4
=2(-2)-8(3)+ 4(3)2+4(-1)
=-4-24+36-4
=4
Sita is y years old this year. Her brother is twice as old as her. How old was her brother 2 years ago?- a)2y−2
- b)2y−4
- c)y−2
- d)y−1
Correct answer is option 'B'. Can you explain this answer?
Sita is y years old this year. Her brother is twice as old as her. How old was her brother 2 years ago?
a)
2y−2
b)
2y−4
c)
y−2
d)
y−1
|
|
Praveen Kumar answered |
Sita's current age = y years.
Her brother's current age = 2y (since he is twice as old as her).
Her brother's current age = 2y (since he is twice as old as her).
Two years ago, her brother's age = 2y−2
Subtracting 2 from 2y:
2y−2−2 = 2y−4
2y−2−2 = 2y−4
What is the coefficient of x² in the expression 5x²yz?- a)5
- b)y
- c)z
- d)5yz
Correct answer is option 'D'. Can you explain this answer?
a)
5
b)
y
c)
z
d)
5yz
|
Namita nambiar answered |
Understanding the Expression
The expression given is 5x²yz. To find the coefficient of x², we need to isolate the term that contains x² and determine its coefficient.
Identifying the Coefficient
- The term "5x²yz" consists of:
- 5: This is the coefficient.
- x²: This is the variable part associated with the coefficient.
- y and z: These are additional variables but do not affect the coefficient of x².
Definition of Coefficient
- A coefficient is a numerical factor in a term of an algebraic expression.
- In this case, the coefficient of x² in the term 5x² is 5.
Considering Other Variables
- While y and z are present in the expression, they do not contribute to the coefficient of x². They are simply part of the term and do not alter the numerical coefficient.
Final Answer
Therefore, when asked for the coefficient of x² in the expression 5x²yz:
- The correct coefficient is 5 (which corresponds to the numerical factor before x²).
- However, since the answer choices include additional variables, the complete expression for the coefficient of x², considering y and z, would be represented as 5yz.
Conclusion
Thus, the correct answer is option D: 5yz, as it includes the coefficient (5) multiplied by the other variables (y and z).
The expression given is 5x²yz. To find the coefficient of x², we need to isolate the term that contains x² and determine its coefficient.
Identifying the Coefficient
- The term "5x²yz" consists of:
- 5: This is the coefficient.
- x²: This is the variable part associated with the coefficient.
- y and z: These are additional variables but do not affect the coefficient of x².
Definition of Coefficient
- A coefficient is a numerical factor in a term of an algebraic expression.
- In this case, the coefficient of x² in the term 5x² is 5.
Considering Other Variables
- While y and z are present in the expression, they do not contribute to the coefficient of x². They are simply part of the term and do not alter the numerical coefficient.
Final Answer
Therefore, when asked for the coefficient of x² in the expression 5x²yz:
- The correct coefficient is 5 (which corresponds to the numerical factor before x²).
- However, since the answer choices include additional variables, the complete expression for the coefficient of x², considering y and z, would be represented as 5yz.
Conclusion
Thus, the correct answer is option D: 5yz, as it includes the coefficient (5) multiplied by the other variables (y and z).
How many terms are there in the algebraic expression 2x² + y² − 3xy + 4?- a)2
- b)3
- c)4
- d)5
Correct answer is option 'C'. Can you explain this answer?
How many terms are there in the algebraic expression 2x² + y² − 3xy + 4?
a)
2
b)
3
c)
4
d)
5
|
|
Praveen Kumar answered |
The algebraic expression 2x² + y² − 3xy + 4 has 4 terms: 2x², y², −3xy, and 4.
What type of expression is x³ + y³ + z³?- a)Monomial
- b)Binomial
- c)Trinomial
- d)Quadrinomial
Correct answer is option 'C'. Can you explain this answer?
What type of expression is x³ + y³ + z³?
a)
Monomial
b)
Binomial
c)
Trinomial
d)
Quadrinomial
|
|
Rainbow Rise Classes answered |
x³ + y³ + z³ is a trinomial because it contains three terms.
What type of expression is a² − b²?- a)Monomial
- b)Binomial
- c)Trinomial
- d)Quadrinomial
Correct answer is option 'B'. Can you explain this answer?
What type of expression is a² − b²?
a)
Monomial
b)
Binomial
c)
Trinomial
d)
Quadrinomial
|
|
Rainbow Rise Classes answered |
a² − b² is a binomial expression because it contains two terms.
What is the numerical coefficient in the term 7abc?- a)7
- b)abc
- c)7abc
- d)1
Correct answer is option 'A'. Can you explain this answer?
a)
7
b)
abc
c)
7abc
d)
1
|
Shiksha Academy answered |
The numerical coefficient in the term 7abc is 7.
The expression "twice the product of 3 and x" is the same as which of the following?- a)2 + (3x)
- b)(2 + 3) x
- c)2 (3x)
- d)2 (3 + x)
Correct answer is option 'C'. Can you explain this answer?
The expression "twice the product of 3 and x" is the same as which of the following?
a)
2 + (3x)
b)
(2 + 3) x
c)
2 (3x)
d)
2 (3 + x)
|
|
Rainbow Rise Classes answered |
The phrase “the product of 3 and x” means 3x.
“Twice” indicates that we multiply the product by 2.
Therefore, “twice the product of 3 and x” can be expressed as:
2(3x)
What is the value of the expression ax² + by² – cz when x = 1, y = -1, z = 2, a = -2, b = 1, and c = -2?- a)1
- b)3
- c)5
- d)7
Correct answer is option 'B'. Can you explain this answer?
What is the value of the expression ax² + by² – cz when x = 1, y = -1, z = 2, a = -2, b = 1, and c = -2?
a)
1
b)
3
c)
5
d)
7
|
|
Praveen Kumar answered |
The value of the expression ax² + by² - cz can be calculated by substituting the given values:
- Let a = -2, b = 1, c = -2, x = 1, y = -1, and z = 2.
- Calculate each term:
- ax²:
-2 * (1)² = -2 - by²:
1 * (-1)² = 1 - cz:
-2 * 2 = -4
- ax²:
- Combine the results:
-2 + 1 - (-4) = -2 + 1 + 4 = 3
Thus, the final value of the expression is 3.
What is the coefficient of x in the expression −12x?- a)12
- b)−12
- c)0
- d)1
Correct answer is option 'B'. Can you explain this answer?
What is the coefficient of x in the expression −12x?
a)
12
b)
−12
c)
0
d)
1
|
|
Rainbow Rise Classes answered |
The coefficient of x in the expression −12x is −12.
What type of expression is a²?- a)Monomial
- b)Binomial
- c)Trinomial
- d)Quadrinomial
Correct answer is option 'A'. Can you explain this answer?
What type of expression is a²?
a)
Monomial
b)
Binomial
c)
Trinomial
d)
Quadrinomial
|
|
Vp Classes answered |
a² is a monomial expression because it contains only one term.
What is the value of the expression ax + by + cz when x = 1, y = -1, z = 2, a = -2, b = 1, and c = -2?- a)-3
- b)-5
- c)-7
- d)-9
Correct answer is option 'C'. Can you explain this answer?
What is the value of the expression ax + by + cz when x = 1, y = -1, z = 2, a = -2, b = 1, and c = -2?
a)
-3
b)
-5
c)
-7
d)
-9
|
|
Praveen Kumar answered |
The value of the expression ax + by + cz can be calculated by substituting the given values:
- Let x = 1, y = -1, z = 2, a = -2, b = 1, and c = -2.
- Substituting these values into the expression:
- ax = -2 * 1 = -2
- by = 1 * (-1) = -1
- cz = -2 * 2 = -4
Now, combine the results:
- -2 + (-1) + (-4) = -2 - 1 - 4 = -7
Thus, the value of the expression is -7.
When a = 0, b = -1, find the value of 2a²b + 2ab² + ab.- a)0
- b)1
- c)-1
- d)-0
Correct answer is option 'A'. Can you explain this answer?
When a = 0, b = -1, find the value of 2a²b + 2ab² + ab.
a)
0
b)
1
c)
-1
d)
-0
|
|
Rainbow Rise Classes answered |
To find the value of the expression:
We need to evaluate the expression 2a²b + 2ab² + ab with the values:
- a = 0
- b = -1
Substituting the values into the expression:
- 2(0)²(-1) + 2(0)(-1)² + (0)(-1)
- = 0 + 0 + 0
- = 0
The final result is 0, which is the required value.
Chapter doubts & questions for Algebraic Expressions - Mathematics (Maths) Class 7 2025 is part of Class 7 exam preparation. The chapters have been prepared according to the Class 7 exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Class 7 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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