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Mindmap- Algebraic Expressions | Mathematics (Maths) Class 7

The document Mindmap- Algebraic Expressions | Mathematics (Maths) Class 7 is a part of the Class 7 Course Mathematics (Maths) Class 7.
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FAQs on Mindmap- Algebraic Expressions - Mathematics (Maths) Class 7

1. What are algebraic expressions?
Ans. Algebraic expressions are mathematical phrases that consist of numbers, variables (letters that represent unknown values), and operations (such as addition, subtraction, multiplication, and division). For example, \(3x + 5\) and \(2a^2 - 4b + 7\) are algebraic expressions.
2. How do you simplify an algebraic expression?
Ans. To simplify an algebraic expression, combine like terms (terms that have the same variable raised to the same power) and perform any arithmetic operations. For example, in the expression \(2x + 3x - 4\), you can combine \(2x\) and \(3x\) to get \(5x - 4\).
3. What is the difference between an algebraic expression and an equation?
Ans. An algebraic expression is a combination of numbers, variables, and operations without an equality sign, while an equation states that two expressions are equal and includes an equality sign (e.g., \(2x + 3 = 7\)).
4. How do you evaluate an algebraic expression?
Ans. To evaluate an algebraic expression, substitute the given values for the variables and then perform the operations. For example, to evaluate \(2x + 3\) for \(x = 4\), substitute \(4\) for \(x\) to get \(2(4) + 3 = 8 + 3 = 11\).
5. Can you give an example of a polynomial and explain its parts?
Ans. A polynomial is a specific type of algebraic expression that consists of terms with non-negative integer exponents. An example of a polynomial is \(4x^3 - 3x^2 + 2x - 5\). This polynomial has four terms: \(4x^3\), \(-3x^2\), \(2x\), and \(-5\). The highest exponent (3) indicates that it is a cubic polynomial.
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