The equation x2−y2=15x^2 - y^2 = 15x2−y2=15 factors as (x−y)(x+y)=15(x - y)(x + y) = 15(x−y)(x+y)=15. Which pair (x,y)(x, y)(x,y) satisfies this?
(x,y)=(8,7)(x, y) = (8, 7)(x,y)=(8,7)
(x,y)=(5,2)(x, y) = (5, 2)(x,y)=(5,2)
(x,y)=(6,1)(x, y) = (6, 1)(x,y)=(6,1)
(x,y)=(4,3)(x, y) = (4, 3)(x,y)=(4,3)