将x²-xy/x²-y²约分x²-xy/x²-y² 是分数形态.
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将x²-xy/x²-y²约分x²-xy/x²-y² 是分数形态.
将x²-xy/x²-y²约分
x²-xy/x²-y² 是分数形态.
将x²-xy/x²-y²约分x²-xy/x²-y² 是分数形态.
x(x-y)/(x+y)(x-y)=x/(x+y)