a^3-2a^2+1怎么因式分解谢谢了,

问题描述:

a^3-2a^2+1怎么因式分解谢谢了,

原式=a-2a+a-a+1 =a(a-2a+1)-(a-1) =a(a-1)-(a-1) =(a-1)【a(a-1)-1】 =(a-1)(a-a-1)