1.

If a(x + y) = b(x - y) = 2ab, then the value of 2(x2 + y2) is1). 2(a2 - b2)2). 2(a2 + b2)3). 4(a2 - b2)4).4(a2 + b2)

Answer» 4(A2 + B2)


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