分解因式:(x+2y)^2+8(x+2y)+16
问题描述:
分解因式:(x+2y)^2+8(x+2y)+16
答
(x+2y)^2+8(x+2y)+16
=(x+2y)^2+2×4×(x+2y)+4²
=(x+2y+4)²