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प्रश्न
Using suitable identities, evaluate the following.
(35.4)2 – (14.6)2
मूल्यांकन
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उत्तर
We have,
(35.4)2 – (14.6)2 = (35.4 + 14.6)(35.4 – 14.6) ...[Using the identity, (a + b)(a – b) = a2 – b2]
= 50 × 20.8
= 1040
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अध्याय 7: Algebraic Expression, Identities and Factorisation - Exercise [पृष्ठ २३३]
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