What is x^2+y^2+6x-47=387 ?

The solution to x^2+y^2+6x-47=387 is Circle with (a,b)=(-3,0),r=sqrt(443)

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x^2+y^2+6x-47=387

x^{2} + y^{2} + 6 x - 47 = 387

(a, b) = (- 3, 0), r = 443

Solution steps

x^{2} + y^{2} + 6 x - 47 = 387

Rewrite

x^{2} + y^{2} + 6 x - 47 = 387

in the form of the standard circle equation

(x - (- 3))^{2} + (y - 0)^{2} = (443)^{2}

Therefore the circle properties are:

(a, b) = (- 3, 0), r = 443

x^{2} + y^{2} - 6 x - 3 y - 12 = 0

x^{2} - 12 x + y^{2} - 18 y + 92 = 0

x^{2} + y^{2} - 6 x - 4 y = 0

4 x^{2} + 4 y^{2} - 16 y + 15 = 0

2 x^{2} + 8 x + 2 y^{2} - 18 y = - \frac{33}{2}

What is x^2+y^2+6x-47=387 ?
The solution to x^2+y^2+6x-47=387 is Circle with (a,b)=(-3,0),r=sqrt(443)