化简求值【x/(x-y)^2】*【x^2-y^2/x^2+xy+y^2】+{【2x+2/x-y】-2},其中x、y满足方程组x+2y=3和x-y=上面没写完的:x-y=-2
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![化简求值【x/(x-y)^2】*【x^2-y^2/x^2+xy+y^2】+{【2x+2/x-y】-2},其中x、y满足方程组x+2y=3和x-y=上面没写完的:x-y=-2](/uploads/image/z/2518617-57-7.jpg?t=%E5%8C%96%E7%AE%80%E6%B1%82%E5%80%BC%E3%80%90x%2F%28x-y%29%5E2%E3%80%91%2A%E3%80%90x%5E2-y%5E2%2Fx%5E2%2Bxy%2By%5E2%E3%80%91%2B%7B%E3%80%902x%2B2%2Fx-y%E3%80%91-2%7D%2C%E5%85%B6%E4%B8%ADx%E3%80%81y%E6%BB%A1%E8%B6%B3%E6%96%B9%E7%A8%8B%E7%BB%84x%2B2y%3D3%E5%92%8Cx-y%3D%E4%B8%8A%E9%9D%A2%E6%B2%A1%E5%86%99%E5%AE%8C%E7%9A%84%EF%BC%9Ax-y%3D-2)
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化简求值【x/(x-y)^2】*【x^2-y^2/x^2+xy+y^2】+{【2x+2/x-y】-2},其中x、y满足方程组x+2y=3和x-y=上面没写完的:x-y=-2
化简求值【x/(x-y)^2】*【x^2-y^2/x^2+xy+y^2】+{【2x+2/x-y】-2},其中x、y满足方程组x+2y=3和x-y=
上面没写完的:x-y=-2
化简求值【x/(x-y)^2】*【x^2-y^2/x^2+xy+y^2】+{【2x+2/x-y】-2},其中x、y满足方程组x+2y=3和x-y=上面没写完的:x-y=-2
∵x+2y=3 x-y=﹣2==﹥x=﹣1/3 y=5/3
∴x+y=4/3
∵原式=x﹙x+y﹚/﹙x³-y³﹚+﹛2x﹙x-y﹚+2﹜/﹙x-y﹚-2
带入x=﹣1/3 y=5/3 x+y=4/3
∴原式=﹣7/3
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