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OpenStudy (anonymous):
simplify the expression: (x-y)(y-x)
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OpenStudy (anonymous):
Factor out a negative 1 from one of those two. Then you can combine them as a square.
OpenStudy (anonymous):
i dont understand.
OpenStudy (anonymous):
I would just foil it (x-y)(y-x) x^2-2xy+y^2
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