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प्रश्न
Using suitable identities, evaluate the following.
(98)2
मूल्यांकन
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उत्तर
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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अध्याय 7: Algebraic Expression, Identities and Factorisation - Exercise [पृष्ठ २३३]
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