已知x^2+4y^2=4xy,求x+2y/x-y的值求、过程

已知x^2+4y^2=4xy,求x+2y/x-y的值求、过程
已知x^2+4y^2=4xy,求x+2y/x-y的值
求、过程

已知x^2+4y^2=4xy,求x+2y/x-y的值求、过程
x^2+4y^2=4xy
x^2+4y^2-4xy=0
(x-2y)^2=0
x-2y=0
x=2y
(x+2y/(x-y)
=4y/y=4

x^2+4y^2=4xy x^2-4xy+4y^2=0 (x-2y)^2=0 x=2y
x+2y/x-y=4y/y=4