分解因式：x的3次方减2x加1
问题描述：
分解因式：x的3次方减2x加1
答
x的3次方减2x加1
=x³-x-(x-1)
=x(x²-1）-(x-1)
=x(x+1)(x-1)-(x-1)
=(x²+x)(x-1)-(x-1)
=(x-1)(x²+x-1)