y(x-y)²-(y-x)^3因式分解-x²y²+z²因式分解
问题描述:
y(x-y)²-(y-x)^3因式分解
-x²y²+z²因式分解
答
原式=y(x-y)²+(x-y)^3
=(x-y)²[y+(x-y)]
=(x-y)²[y+x-y]
=x(x-y)²
第2题:
-x²y²+z²
=z²-x²y²
=(z+xy)(z-xy)