What is the center of the circle defined by x2+y2+6x−10y=2x^2 + y^2 + 6x - 10y = 2x2+y2+6x−10y=2?
(6,−10)(6, -10)(6,−10)
(−3,5)(-3, 5)(−3,5)
(3,−5)(3, -5)(3,−5)
(−6,10)(-6, 10)(−6,10)