Factorise the following (x+y)²-(x-y)² – InterviewSolution

1.

Factorise the following (x+y)²-(x-y)²

Answer»

(x+y)²-(x-y)²

x²+y²+2xy - (x²+y²-2xy)

x²+y²+2xy - x²- y² + 2xy

2xy + 2xy

4xy

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