计算:[(2x-y)(2x+y)+y(y-6x)]÷2x.
问题描述:
计算:[(2x-y)(2x+y)+y(y-6x)]÷2x.
答
[(2x-y)(2x+y)+y(y-6x)]÷2x
=(4x2-y2+y2-6xy)÷2x
=(4x2-6xy)÷2x
=2x-3y