通分:-x/a(x-y) ,y/b(y-x)
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通分:-x/a(x-y) ,y/b(y-x)
![通分:-x/a(x-y) ,y/b(y-x)](/uploads/image/z/20295198-54-8.jpg?t=%E9%80%9A%E5%88%86%3A-x%2Fa%28x-y%29+%2Cy%2Fb%28y-x%29)
xb/ab(y-x),ya/ab(y-x)
祝你学习天天向上,加油!
祝你学习天天向上,加油!
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