分解因式 4a(x-y)²-a²(y-x)³ (x+y+z)(x-y+z)+(y-x+z) (y-x-z)
问题描述:
分解因式 4a(x-y)²-a²(y-x)³ (x+y+z)(x-y+z)+(y-x+z) (y-x-z)
(1)4a(x-y)²-a²(y-x)³
(2)(x+y+z)(x-y+z)+(y-x+z) (y-x-z)
答
4a(x-y)²-a²(y-x)³
=4a(x-y)²+a²(x-y)³
=a(x-y)²[4+a(x-y)]
(x+y+z)(x-y+z)+(y-x+z) (y-x-z)
=(x+y+z)(x-y+z)-(y-x+z) (x-y+z)
= (x-y+z)(x+y+z-y+x-z)
=2x(x-y+z)