{(x+2y)(x-2y)+[2(x-y)]²}÷6x=?

问题描述:

{(x+2y)(x-2y)+[2(x-y)]²}÷6x=?

原式=(x²-4y²+4x²-8xy+4y²)÷6x
=(5x²-8xy)÷6x
=(5x-8y)/6