Find the equation of a circle passing through (1,2)(1, 2)(1,2) with center (2,−1)(2, -1)(2,−1).
(x−2)2+(y+1)2=10(x - 2)^2 + (y + 1)^2 = 10(x−2)2+(y+1)2=10
(x−2)2+(y+1)2=9(x - 2)^2 + (y + 1)^2 = 9(x−2)2+(y+1)2=9
(x+2)2+(y−1)2=10(x + 2)^2 + (y - 1)^2 = 10(x+2)2+(y−1)2=10
(x−2)2+(y−1)2=10(x - 2)^2 + (y - 1)^2 = 10(x−2)2+(y−1)2=10