计算:[(x-2y)^+(x-2y)(x+2y)-2x(2x-y)]÷2x
问题描述:
计算:[(x-2y)^+(x-2y)(x+2y)-2x(2x-y)]÷2x
答
[(x-2y)^+(x-2y)(x+2y)-2x(2x-y)]
=[x^-4xy+4y^+x^2-4y^-4x^+2xy]
=(-2x^-2xy)
原式=(-2x^-2xy)/2x=-x-y