SOLUTION: Simplify (x + y)2 + (x - y)2 - 2(x2+y2)

SOLUTION: Simplify (x + y)2 + (x - y)2 - 2(x2+y2)

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Question 647904: Simplify (x + y)2 + (x - y)2 - 2(x2+y2)
Answer by rfer(16322) (Show Source): You can put this solution on YOUR website!
=-xy
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