已知方程3(X-Y)^2-5X-2=2X-7Y-4.求X-Y的值
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已知方程3(X-Y)^2-5X-2=2X-7Y-4.求X-Y的值
![已知方程3(X-Y)^2-5X-2=2X-7Y-4.求X-Y的值](/uploads/image/z/18308138-50-8.jpg?t=%E5%B7%B2%E7%9F%A5%E6%96%B9%E7%A8%8B3%28X-Y%29%5E2-5X-2%3D2X-7Y-4.%E6%B1%82X-Y%E7%9A%84%E5%80%BC)
方程整理得:3(X-Y)^2-7(X-Y)+2=0
即(X-Y-2)[3(X-Y)-1]=0
所以X-Y=2或X-Y=1/3
即(X-Y-2)[3(X-Y)-1]=0
所以X-Y=2或X-Y=1/3
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