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Question
Using suitable identities, evaluate the following.
(729)2 – (271)2
Evaluate
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Solution
We have,
(729)2 – (271)2 = (729 + 271)(729 – 271) ...[Using the identity, a2 – b2 = (a + b)(a – b)]
= 1000 × 458
= 458000
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Chapter 7: Algebraic Expression, Identities and Factorisation - Exercise [Page 233]
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