(x³-2x²)-(x-2)=0
x²(x-2)-(x-2)=0
(x-2)(x²-1)=0
(x-2)(x-1)(x+1)=0
则:x=2或x=1或x=-1
x=2,x=1,x=-1
(x²-1)*(x-2)=0
x=-1,x=1,x=2
x^2(x-2)-(x-2)=0推出(x^2-1)(x-)=0即(x+1)(x-1)(x-2)=0则x=-1或1或2
x³-2x²-x+2=0
x²(x-2)-(x-2)=0
(x²-1)(x-2)=0
(x-1)(x+1)(x-2)=0
解得x=1或x=-1或x=2
采用分组分解法(x³-2x²)-(x-2)=0
x²(x-2)-(x-2)=0
(x-2)(x²-1)=0
(x-2)(x-1)(x+1)=0
则:x1=2或x2=1或x3=-1