初二数学化简分式x^2 -y^2/xy - xy-y^2/xy-x^2

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初二数学化简分式x^2 -y^2/xy - xy-y^2/xy-x^2
x^2 -y^2/xy - xy-y^2/xy-x^2

(x^2-y^2)/xy-y(x-y)/x(y-x)
=(x^2-y^2)/xy+y/x
=(x^2-y^2)/xy+y^2/xy
=x^2/xy
=x/y
在此声明答案只有这一个,楼上x=y的情况不成立

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