化简求:(1/2x-2y)^2-(1/2x+2y)^2

问题描述:

化简求:(1/2x-2y)^2-(1/2x+2y)^2

原式=(1/2x-2y+1/2x+2y)(1/2x-2y-1/2x-2y)
=x(-4y)
=-4xy