解方程(x-6)(x^2+x+1)-x(x+1)(x-1)=x(2-5x)
4个回答
(x-6)(x^2+x+1)-x(x+1)(x-1)=x(2-5x)
x^3+x^2+x-6x^2-6x-6-x^3+x=2x-5x^2
-4x-6=2x
6x=-6
x=-1
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