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