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Class 9 Mathematics Exploring Algebraic Identities Quadratic expressionsHardLevel 74

What is the simplified form of ((2x+5)^2-(2x-5)^2)?

Answer and explanation

Correct answer: (40x)

Using ((a+b)^2-(a-b)^2=4ab) with (a=2x) and (b=5) gives (40x). Exam tip: apply the identity directly.

Tags

binomial identitydifferencequadratic simplification

Frequently asked questions

What is the correct answer to this question?

(40x)

Why is this the correct answer?

Using ((a+b)^2-(a-b)^2=4ab) with (a=2x) and (b=5) gives (40x). Exam tip: apply the identity directly.

Which subject and chapter does this question cover?

This is a Class 9 Mathematics question. Chapter: Exploring Algebraic Identities. Topic: Quadratic expressions.

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