【xy-x²】*xy/x-y

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【xy-x²】*xy/x-y【xy-x²】*xy/x-y【xy-x²】*xy/x-y解(xy-x²)xy/(x-y)=x²y(y-x)/[-(y-x)

【xy-x²】*xy/x-y
【xy-x²】*xy/x-y

【xy-x²】*xy/x-y
解
(xy-x²)xy/(x-y)
=x²y(y-x)/[-(y-x)]
=-x²y