What is x^2+y^2-12x+2y=-21 ?

The solution to x^2+y^2-12x+2y=-21 is Circle with (a,b)=(6,-1),r=4

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x^2+y^2-12x+2y=-21

x^{2} + y^{2} - 12 x + 2 y = - 21

(a, b) = (6, - 1), r = 4

Solution steps

x^{2} + y^{2} - 12 x + 2 y = - 21

Rewrite

x^{2} + y^{2} - 12 x + 2 y = - 21

in the form of the standard circle equation

(x - 6)^{2} + (y - (- 1))^{2} = 4^{2}

Therefore the circle properties are:

(a, b) = (6, - 1), r = 4

What is x^2+y^2-12x+2y=-21 ?
The solution to x^2+y^2-12x+2y=-21 is Circle with (a,b)=(6,-1),r=4