(x-5)^2+(y+2)^2=85

解答

(x - 5)^{2} + (y + 2)^{2} = 85

(a, b) = (5, - 2), r = 85

求解步骤

(x - 5)^{2} + (y + 2)^{2} = 85

将

(x - 5)^{2} + (y + 2)^{2} = 85

改写为圆标准方程

(x - 5)^{2} + (y - (- 2))^{2} = (85)^{2}

因此圆的性质是:

(a, b) = (5, - 2), r = 85

(x - 4)^{2} + (y - 3)^{2} = 29

(x - 4)^{2} + (y - 3)^{2} = 25

x^{2} - 5 = - y^{2}

(x - 5)^{2} + (y + 2)^{2} = 64

(x - 1.5)^{2} + (y + 2.5)^{2} = 1.15