已知x+2y=11,x-2y=4,x\(x^2-2xy+y^2)除以(x^2+xy+y^2)\(x^3-y^3)+[(2
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已知x+2y=11,x-2y=4,x\(x^2-2xy+y^2)除以(x^2+xy+y^2)\(x^3-y^3)+[(2x+2y)\(x-y)-2]的值
正确补加悬赏
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正确补加悬赏
![](http://img.wesiedu.com/upload/0/01/001ae5e4dc55d4674e750a1c5288f170.jpg)
![已知x+2y=11,x-2y=4,x\(x^2-2xy+y^2)除以(x^2+xy+y^2)\(x^3-y^3)+[(2](/uploads/image/z/11951108-44-8.jpg?t=%E5%B7%B2%E7%9F%A5x%2B2y%3D11%2Cx-2y%3D4%2Cx%5C%28x%5E2-2xy%2By%5E2%29%E9%99%A4%E4%BB%A5%28x%5E2%2Bxy%2By%5E2%29%5C%28x%5E3-y%5E3%29%2B%5B%282)
x+2y=11,x-2y=4.x=15/2,y=7/4
原式=(x+4y)/(x-y)=58/23
原式=(x+4y)/(x-y)=58/23
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