x^4-x^3-2mx-2
=x^3(x-1)+2(-mx-1)
1=-m
m=-1
原式=x^3(x-1)+2(x-1)
=（x-1）(x^3+2)请问你，确定正确吗？若有冒犯，对不起哈。o少了一项x^4-x^3＋mx²-2mx-2=x^3(x-1)+(x-1)(mx+2)-mx+2x=-2mx-m+2=-2mm=-2 x^4-x^3＋mx²-2mx-2=x^3(x-1)-2x^2+4x-2=x^3(x-1)-2(x^2-2x+1)=x^3(x-1)-2(x-1)^2=(x-1)(x^3-2x+2)谢谢了！