x/xy-y²与y/x²-xy 通分
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![x/xy-y²与y/x²-xy 通分](/uploads/image/z/3172705-25-5.jpg?t=x%2Fxy-y%26%23178%3B%E4%B8%8Ey%2Fx%26%23178%3B-xy+%E9%80%9A%E5%88%86)
x/xy-y²与y/x²-xy 通分
x/xy-y²与y/x²-xy 通分
x/xy-y²与y/x²-xy 通分
x/(xy-y²)=x/[y(x-y)]
y/(x²-xy)=y/[x(x-y)]
∴公分母为:xy(x-y)
通分后得
x/(xy-y²)=x²/[xy(x-y)]
y/(x²-xy)=y²/[xy(x-y)]
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