Find the center of the circle x2+y2+4x−2y−11=0x^2 + y^2 + 4x - 2y - 11 = 0x2+y2+4x−2y−11=0.
(−2,1)(-2, 1)(−2,1)
(2,−1)(2, -1)(2,−1)
(−4,2)(-4, 2)(−4,2)
(4,−2)(4, -2)(4,−2)