2x^2+2y^2=18

解答

2 x^{2} + 2 y^{2} = 18

(a, b) = (0, 0), r = 3

求解步骤

2 x^{2} + 2 y^{2} = 18

将

2 x^{2} + 2 y^{2} = 18

改写为圆标准方程

(x - 0)^{2} + (y - 0)^{2} = 3^{2}

因此圆的性质是:

(a, b) = (0, 0), r = 3

x^{2} + y^{2} - 32 x - 24 y + 396 = 0

(x + 1)^{2} + (y + 3)^{2} = 9

2 x^{2} + 2 y^{2} - 8 x + 24 y + 4 = 0

x^{2} + y^{2} + 40 x + 30 y = 975

96 + 32 x + 16 x^{2} - 96 y + 16 y^{2} = 0