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Numbers - General Aptitude

Q1:

(963 + 476)2 + (963 - 476)2 = ?
(963 x 963 + 476 x 476)

A 1449

B 497

C 2

D 4

E None of these

ANS:C - 2

Given Exp. = (a + b)2 + (a - b)2 = 2(a2 + b2) = 2
(a2 + b2) (a2 + b2)