Which integer pairs satisfy x2−3xy+y2=1x^2 - 3xy + y^2 = 1x2−3xy+y2=1?
(1,0)(1, 0)(1,0)
(1,1)(1, 1)(1,1)
(1,3)(1, 3)(1,3)
(3,8)(3, 8)(3,8)