分式(x²-y²\xy)-(xy-y²\xy-x²)可化简为

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分式(x²-y²\xy)-(xy-y²\xy-x²)可化简为
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分式(x²-y²\xy)-(xy-y²\xy-x²)可化简为
分式(x²-y²\xy)-(xy-y²\xy-x²)可化简为

分式(x²-y²\xy)-(xy-y²\xy-x²)可化简为
原式=(x²-y²)/xy+y(x-y)/x(x-y)
=(x²-y²)/xy+y/x
=(x²-y²+y²)/xy
=x²/xy
=x/y