通分x-y/3x+3y与2xy/(x+y)^2
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通分x-y/3x+3y与2xy/(x+y)^2
![通分x-y/3x+3y与2xy/(x+y)^2](/uploads/image/z/18890366-14-6.jpg?t=%E9%80%9A%E5%88%86x-y%2F3x%2B3y%E4%B8%8E2xy%2F%28x%2By%29%5E2)
(X-Y)*(X+Y)/3(X+Y)^2与6XY/3(X+Y)^2.
(X^2-Y^2)/3(X+Y)^2与6XY/3(X+Y)^2.
(X^2-Y^2)/3(X+Y)^2与6XY/3(X+Y)^2.
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