把1+a+a(a+1)+a(a+1)2+a(a+1)3分解因式.

问题描述:

把1+a+a(a+1)+a(a+1)2+a(a+1)3分解因式.
用提公因式法解

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