If x2−y2=8x^2 - y^2 = 8x2−y2=8, which of the following are integer solutions (x,y)(x, y)(x,y)?
(3,1)(3, 1)(3,1)
(3,−1)(3, -1)(3,−1)
(4,2)(4, 2)(4,2)
(2,4)(2, 4)(2,4)