(x-1)^2+(y-2)^2=30

解答

(x - 1)^{2} + (y - 2)^{2} = 30

(a, b) = (1, 2), r = 30

求解步骤

(x - 1)^{2} + (y - 2)^{2} = 30

将

(x - 1)^{2} + (y - 2)^{2} = 30

改写为圆标准方程

(x - 1)^{2} + (y - 2)^{2} = (30)^{2}

因此圆的性质是:

(a, b) = (1, 2), r = 30

x^{2} + y^{2} = 26

(x - 5)^{2} + (y + 4)^{2} = 5^{2}

x^{2} + y^{2} - 4 y - 21 = 0

3 x^{2} + 3 y^{2} - 4 x + 8 y = 0

x^{2} + (y + 2)^{2} = 16