分解因式10xy-5y^2-(y-2x)^2
问题描述:
分解因式10xy-5y^2-(y-2x)^2
答
10xy-5y^2-(y-2x)^2
=5y(2x-y)-(2x-y)²
=(2x-y)(5y-2x+y)
=(2x-y)(-2x+6y)