因式分解:a^4+2a^3+2a^2+2a+1 求详细过程因式分解:a^4+2a^3+2a^2+2a+1求详细过程

问题描述:

因式分解:a^4+2a^3+2a^2+2a+1 求详细过程
因式分解:a^4+2a^3+2a^2+2a+1
求详细过程

a^4+2a^3+2a^2+2a+1
=(a^4+2a^2+1)+2a(a^2+1)
=(a^2+1)^2+2a(a^2+1)
=(a^2+1)(a^2+2a+1)
=(a+1)^2•(a^2+1)