Which integer pair (x,y)(x, y)(x,y) satisfies x2+2xy−3y2=0x^2 + 2xy - 3y^2 = 0x2+2xy−3y2=0?
(1,1)(1, 1)(1,1)
(3,1)(3, 1)(3,1)
(1,2)(1, 2)(1,2)
(2,2)(2, 2)(2,2)