计算:[(x+2y)(x-2y)+(x-2y)^2]÷(6x)

问题描述:

计算:[(x+2y)(x-2y)+(x-2y)^2]÷(6x)

[(x+2y)(x-2y)+(x-2y)^2]÷(6x)
=[(x-2y)(x+2y+x-2y)]÷(6x)
=[2x(x-2y)]÷(6x)
=(x-2y) / 3