Prove that (x+y)2 – (x-y)2 = 4xy.tq sis please ans me – InterviewSolution

1.

Prove that (x+y)2 – (x-y)2 = 4xy.tq sis please ans me

Answer»

(x+y+x-y)(x+y-x+y)

=2x.2y=4xy

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