[tex](x^2 +64x) + (y^2 -6y) = -64[/tex]
[tex](x^2 + 64x + (\frac{64}{2})^2) + (y^2 -6y + (\frac{6}{2})^2) = -64 +(\frac{64}{2})^2+(\frac{6}{2})^2[/tex]
[tex](x+32)^2 + (y-3)^2 = -64 +1024+9 = 969[/tex]
El centro es: (-32,3)
El radio es:[tex] \sqrt{969} [/tex]
