X 2 y 2 6x 2y 6 July 8, 2019 16 32 64 128 X 2 y 2 6x 2y 6 0 The equation of a circle is x 2 y 2 6x 2y 6 Cho c x 2 y 2 6x 2y 6 0 Đường tròn c x 2 y 2 6x 2y 6 0 3x + 2y = 6
