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Numbers

Q1: 287 x 287 + 269 x 269 - 2 x 287 x 269 = ?

A 534

B 446

C 354

D 324

E None of these

ANS:D - 324

Given Exp. = a2 + b2 - 2ab, where a = 287 and b = 269
  = (a - b)2 = (287 - 269)2
  = (182)
  = 324



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