a的三次方+3a的平方b+3ab+1因式分解
问题描述：
a的三次方+3a的平方b+3ab+1因式分解
答
a^3+3(a^2)b+3ab+1
=a^3+3ab(a+1)+1
=(a+1)(a^2-a+1)+3ab(a+1)
=(a+1)(a^2-a+1+3ab)