【(2x-y)(2x+y)+y(y-6x)】÷2x
问题描述:
【(2x-y)(2x+y)+y(y-6x)】÷2x
答
=(4x^2-y^2+y^2-6xy)÷2x
=(4x^2-6xy)÷2x
=2x-3y