If 2x^2 + y^2 = 2xy, then (x - y)^2 =  Select the correct option.
A) -x^2  B) 3x^2  C) 4xy  D) 2y^2  E) – y^2
(x-y)^2 = x^2 + y^2 - 2xy = x^2 + y^2-2x^2-y^2 = -x^2   Correct option : -x^2
<result>A</result>
If 2x^2 + y^2 = 2xy, then (x - y)^2 =