因式分解-2x方+1/2y方答案

问题描述:

因式分解-2x方+1/2y方答案

原式=1/2(y^2-4x^2)=1/2(y-2x)(y+2x)

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