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प्रश्न
Using suitable identities, evaluate the following.
(729)2 – (271)2
उत्तर
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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