化简:(2x-y)^2-2(2x-y)(2x+y)+(2x+y)^2,并求当|x+2y-1|+(2x-y-2)^2=0,代数式值

化简:(2x-y)^2-2(2x-y)(2x+y)+(2x+y)^2,并求当|x+2y-1|+(2x-y-2)^2=0,代数式值
化简:(2x-y)^2-2(2x-y)(2x+y)+(2x+y)^2,并求当|x+2y-1|+(2x-y-2)^2=0,代数式值

化简:(2x-y)^2-2(2x-y)(2x+y)+(2x+y)^2,并求当|x+2y-1|+(2x-y-2)^2=0,代数式值
|x+2y-1|+(2x-y-2)^2=0
|x+2y-1=0,+(2x-y-2)^2=0
x+2y-1=0
2x-y-2=0
解得
x=1
y=0
(2x-y)^2-2(2x-y)(2x+y)+(2x+y)^2
=[(2x-y)-(2x+y)]^2
=(2x-y-2x-y)^2
=(-2y)^2
=4y^2
=4*0^2
=0