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