2x^3-6x^2+8=0x^3-3x^2+4=0x^3-3x^2+3+1=0x^3+1-3x^2+3=0(x^3+1)-3(x^2-1)=0(x+1)(x^2-x+1)-3(x-1)(x+1)=0(x+1)(x^2-x+1-3(x-1))=0(x+1)(x^2-x+1-3x+3)=0(x+1)(x^2-4x+4)=0(x+1)(x-2)^2=0解题思路,就是把常数项拆开,...