因式分解 (x-z)²-4(y+z)²
问题描述:
因式分解 (x-z)²-4(y+z)²
答
(x-z)²-4(y+z)²
=[(x-z)+2(y+z)][(x-z)-2(y+z)]
=(x-z+2y+2z)(x-z-2y-2z)
=(x+2y+z)(x--2y-3z)