factorise X + y whole square minus x minus y whole square
Answers
Answered by
62
(x+y)²-(x-y)²
=(x²+2xy+y²)-(x²-2xy+y²)
=x²+2xy+y²-x²+2xy-y²
=2xy+2xy
=4xy
This is the answer i guess
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Answered by
20
(x+y)²-(x-y)²
=(x²+2xy+y²)-(x²-2xy+y²)
=x²+2xy+y²-x²+2xy-y²
=2xy+2xy
=4xy
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