解方程：x2=6x2-x+x-1-数学

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• 解方程x2+x+1=2x2+x时，如果设y=x2+x，那么原方程可化为（）A．y2+y-2=0B．y2-y+2=0C．y2+y+2=0D．y2-y-2=0-数学
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• 解方程：。-九年级数学
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• 解方程：x2+1x-1-3x-3x2+1+2=0．-数学
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