Which of these integer pairs (x,y)(x, y)(x,y) satisfies x2=9x^2 = 9x2=9 and y2=16y^2 = 16y2=16?
(3,4)(3, 4)(3,4)
(−3,4)(-3, 4)(−3,4)
(3,−4)(3, -4)(3,−4)
(4,3)(4, 3)(4,3)