Mrs Culland is finding the center of a circle whose equation is x y2 6x 4y 3 0 by completing the square Her work is shown 2 6x 4y 3 0 6x y 4y 3 0 x 6x y 4y 3 x2 6x 9 2 4y 4 3 9 4 Which completes the work correctly O x 3 y 2 2 42 so the center is 3 2 O x 3 2 y 2 2 42 so the center is 3 2 O x 3 y 2 2 42 so the center is 3 2 x 3 y 2 2 42 so the center is 3 2