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Question
Expand the following, using suitable identities.
`(2/3x - 3/2y)^2`
Sum
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Solution
We have,
`(2/3x - 3/2y)^2 = (2/3 x)^2 + (3/2 y)^2 - 2 xx 2/3 x xx 3/2 y` ...[Using the identity, (a – b)2 = a2 + b2 – 2ab]
= `4/9 x^2 + 9/4 y^2 - 2xy`
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Chapter 7: Algebraic Expression, Identities and Factorisation - Exercise [Page 232]
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