因式分解怎样分解因式：x3
怎样分解因式：x3-3x2-6x+8
x^3-3x^2-6x+8 =(x^3-x^2)-(2x^2-2x)-(8x-8) =x^2(x-1)-2x(x-1)-8(x-1) =(x-1)(x^2-2x-8) =(x-1)(x-4)(x+2).