The number of terms in the expression 2x2+3x+5 is
Yes 3 as the terms are 2x2 ,3x, 5
The coefficient of x in the expression -7x +5 is
The numerical coefficient of y in the expression 2x+3y+7z is
Since the expression 2x+3y+7z cannot be added as they have different variables so the coefficient of y is 3 only.
The expression y+z+100 is a
The expression 7xy has the factors
The common factors of 2y. 22xy is
Factors of 22xy are 2*11*x*y, so common factors are 2y.
‘2’ is common factor of the expressions
The factorization of 7a2+14a is
The addition of ab-bc, bc-ca, ca-ab is
ab-bc+bc-ca+ca-ab=0, because we have ab-ab,bc-bc,ca-ca all equal to zero.
One of the example of binomial is
The area of rectangle is’ xy’ where’ x’ is length and ‘y’ is breadth. If the length of rectangle is increased by 5 units and breadth is decreased by 3 units, the new area of rectangle will be
initial area = xy
after increaasing length by 5 units and breadth is decreased by 3 units
new length = x+5
new breadth = y-3
new area = (x+5)(y-3)
The value of 2x (-3x) is
Like terms in the expression 7x,5x2,7y, -5yx, -9x2, are
Like terms consist of same variables with same powers.
Area of rectangle of length’ 3x’ and breadth ‘5y ‘is
Number of terms in the expression xyz+1 is
The product of -4p and 7p is
What degree does x3 - x2y2 - 8y2+ 2 have?
The correct answer is c
The given quadratic polynomial:
To find the highest degree of the polynomial
The degree of = 3
The degree of = 2 + 2 = 4
The degree of = 2 and
The degree of 2 = 0
∴ The highest degree of the given polynomial = 4
Hence, the highest degree of the given polynomial = 4
Multiplication of pq+qr+rp and ‘zero’ is
The value of 3x(4x-5)+3 for x = 3
The volume of rectangular box whose length, breadth and height is 2p,4q.8r respectively is
length = 2p
Volume = length x breadth x height
=2p x 4q x 8r
Answer : 64pqr
Numerical coefficient of x2y in the expression 1+x+2x2y is
What is the value of 5x25 - 3x32 + 2x-12 at x = 1 ?
The correct answer is c
By putting value of x = 1
5(1)^25 - 3(1)^32 + 2(1)^-12
5×(1) - 3×(1) + 2×(1)
If we give 1 any raised power the answer is always 1 .e.g 1^4= 1×1×1×1=1
=5 - 3 + 2.
= 2 + 2.
Which of the following expression is trinomial
Which of the following expression is monomial
Multiplication of ‘ab’ and ‘a-b’ is
The suitable identity to find (x+3)(x+3) is
Value of (4p – 3q)2 is
Using (a - b)2
(4p - 3q)2
= 16p2 - 24pq + 9q2
(9x+a)(x+b) is equal to
=9x2 + 9bx+ax+ab
Value of expression ‘a(a2+a +1)+5’ for ‘ a’ = 0 is
Which of the following is not binomial
Subtracting 7x +y from –x +y gives
-x + y - (7x + y)
Which identity is used to evaluate (m+3)(m+2).
Use suitable identity to evaluate 992.
99 can be written as 100-1
992 = (100 -1)2 = 1002 + 1 -200
= 10000 + 1 -200
Evaluate (4x+y)2 by suitable identity
Find the value of 95 x 102 by suitable identity.
95 x 102 = (100-5)(100+2) = 1002+(-5+2)100+(-5)2 = 10000-300-10 = 9690
Which of the following is obtained by subtracting x2-y2 from y2 - x2?
y2 - x2 - ( x2 - y2)
= 2y2 - 2x2
= -2(x2 - y2)
(a-b)2 is equal to
Using identity a2 – b2 = (a+b)(a-b), find 42-62
42 - 62=(4-6)(4+6)=-2*10=-20
The expression in one variable is
Since option (b),(c) and (d) have two variables x and y ,the answer is x+x2+1
(a+b)(a-b) is equal to