Numbers

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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