Which of these points (x,y)(x, y)(x,y) satisfies the equation x2=y2x^2 = y^2x2=y2?
(2,2)(2, 2)(2,2)
(2,−2)(2, -2)(2,−2)
(0,0)(0, 0)(0,0)
(1,2)(1, 2)(1,2)