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1. 287 x 287 + 269 x 269 - 2 x 287 x 269 = ?
(A): 324
(B): 354
(C): 446
(D): 534
(E): None of these
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By: guest on 01 Jun 2017 05.47 pm
Given Exp. = a2 + b2 - 2ab, where a = 287 and b = 269 = (a - b)2 = (287 - 269)2 = (182) = 324
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