解方程(x²-x+4)x-(x-1)(x²+2)=x+7
问题描述：
解方程(x²-x+4)x-(x-1)(x²+2)=x+7
答
x^3-x^2+4x-x^3+x^2-2x+2=x+7 x=5
答
(x²-x+4)x-(x-1)(x²+2)=x+7
x³-x²+4x-x³+x²-2x+2=x+7
2x+2=x+7
2x-x=7-2
x=5