Which of these is a solution to x2−3xy+y2=1x^2 - 3xy + y^2 = 1x2−3xy+y2=1?
(1,1)(1, 1)(1,1)
(2,1)(2, 1)(2,1)
(3,1)(3, 1)(3,1)
(5,2)(5, 2)(5,2)