a^2-4ab+4b^2+2a-4b+1因式分解为多少,

问题描述:

a^2-4ab+4b^2+2a-4b+1因式分解为多少,

a^2-4ab+4b^2+2a-4b+1
=(a-2b)^2+2(a-2b)+1
=[(a-2b)+1]^2
=(a-2b+1)^2