[(x-2y)²+(x+y)(3x-y)-3y²]÷2x

问题描述:

[(x-2y)²+(x+y)(3x-y)-3y²]÷2x
化简。

[(x-2y)²+(x+y)(3x-y)-3y²]÷2x
=(4x²-2xy)/2x
=2x-y