分式的相加1题2/x-y + x/y - 1/x

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分式的相加1题2/x-y+x/y-1/x分式的相加1题2/x-y+x/y-1/x分式的相加1题2/x-y+x/y-1/x原式=2xy/[xy(x-y)]+x²(x-y)/[xy(x-y)]-

分式的相加1题2/x-y + x/y - 1/x
分式的相加1题
2/x-y + x/y - 1/x

分式的相加1题2/x-y + x/y - 1/x
原式
=2xy/[xy(x-y)]+x²(x-y)/[xy(x-y)]-y(x-y)/[xy(x-y)]
=[2xy+x²(x-y)-y(x-y)]/[xy(x-y)]
=(2xy+x³-x²y-xy+y²)/[xy(x-y)]
=(x³-x²y+xy+y²)/[xy(x-y)]

(x^2+y)(x+y)/xy(x-y)