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Question
Using suitable identities, evaluate the following.
(98)2
Evaluate
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Solution
We have,
(98)2 = (100 – 2)2
= (100)2 + (2)2 – 2 × 100 × 2 ...[Using the identity, (a – b)2 = a2 + b2 – 2ab]
= 10000 + 4 – 400
= 9604
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Chapter 7: Algebraic Expression, Identities and Factorisation - Exercise [Page 233]
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