Math, asked by kalpana012012Tiwari, 7 months ago

simplify the following using identities:-
(109)² + (91)²

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Answered by Anonymous

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$(109) {}^{2} + (91) {}^{2} \\ (100 + 9) + (100 - 9) \\ (a + b)(a - b) = (a) {}^{2} - (b) {}^{2} \\ (100) {}^{2} - (9) {}^{2} \\ 10000 - 81 \\ 9919$

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