约分(x²y+xy²)/(xy³-x³y)算了 自己算出了 1/y-x
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约分(x²y+xy²)/(xy³-x³y)算了 自己算出了 1/y-x
约分(x²y+xy²)/(xy³-x³y)
算了 自己算出了 1/y-x
约分(x²y+xy²)/(xy³-x³y)算了 自己算出了 1/y-x
解(x²y+xy²)/(xy³-x³y)
=xy(x+y)/xy(y²-x²)
=(x+y)/(y²-x²)
=(x+y)/(y-x)(y+x)
=1/(y-x)