简单:x^3-x^2(x+1)+(x-1)(x+1)=2x+2 整理得: -1=2x+2 得:x=-3/2
x³/(x+1)-x²+x-1=2
x³-x²(x+1)+x(x+1)-(x+1)=2(x+1)
x³-x³-x²+x²+x-x-1-2x-2=0
2x=-3
x=-1.5
负2分之3
x^3/(x+1)-x^2+x-1=2
x^3+(x+1)(-x^2+x-1)=2(x+1)
x^3-(x+1)(x^2-x+1)=2(x+1)
x^3-(x^3+1)=2x+2
x^3-x^3-1=2x+2
2x=-3
x=-3/2