a平方(a+1)+2a(a+1)+a+1

问题描述:

a平方(a+1)+2a(a+1)+a+1

因式分解?
a²(a+1)+2a(a+1)+a+1
=a²(a+1)+2a(a+1)+(a+1)
=(a+1)(a²+2a+1)
=(a+1)(a+1)²
=(a+1)³