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Class 9 Mathematics Exploring Algebraic Identities Algebraic identitiesExpert

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Why can ( (4x+y)^2-(4x-y)^2 ) be written equal to (32xy)?

Answer and explanation

Correct answer: Because in (4uv), (u=4x) and (v=y)

( (u+v)^2-(u-v)^2=4uv ). With (u=4x) and (v=y), it gives (16xy), so (32xy) is not correct.

Related tags

Error Analysis Difference Identity 4Uv Algebraic Identities Exploring Algebraic Identities Mathematics Class 9 Mcq

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