怎么计算x-y分之x^2-x+y
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怎么计算x-y分之x^2-x+y怎么计算x-y分之x^2-x+y怎么计算x-y分之x^2-x+yx^2/(x-y)-x+y=x^2/(x-y)-(x-y)=[x^2-(x-y)(x-y)]/(x-y)
怎么计算x-y分之x^2-x+y
怎么计算x-y分之x^2-x+y
怎么计算x-y分之x^2-x+y
x^2/(x-y)-x+y
=x^2/(x-y)-(x-y)
=[x^2-(x-y)(x-y)]/(x-y)
=(x^2-x^2+y^2)/(x-y)
=y^2/(x-y)
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