What is x^2-6+y^2=81 ?

The solution to x^2-6+y^2=81 is Circle with (a,b)=(0,0),r=sqrt(87)

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x^2-6+y^2=81

x^{2} - 6 + y^{2} = 81

(a, b) = (0, 0), r = 87

Solution steps

x^{2} - 6 + y^{2} = 81

Rewrite

x^{2} - 6 + y^{2} = 81

in the form of the standard circle equation

(x - 0)^{2} + (y - 0)^{2} = (87)^{2}

Therefore the circle properties are:

(a, b) = (0, 0), r = 87

x^{2} + (y + 1)^{2} - 4 = 0

(x - \frac{33}{4})^{2} + y^{2} = 25

0 > (x - 1)^{2} + y^{2} - 1

x^{(2)} + y^{(2)} + 4 x - 4 y - 1 = 0

x, x^{2} = 8 - r (x)^{2}

What is x^2-6+y^2=81 ?
The solution to x^2-6+y^2=81 is Circle with (a,b)=(0,0),r=sqrt(87)