Circles

It's ya boy Rico gatz in the building getting his blog game on ya digg. Lemme holla at ya real quick about circles.

Ex: find the center and radius by completing the square


X^2 + y^2 - 6x + 4y - 12= 0

1.) x^2-6x+9+y^2+4y+ =12+9
2.) x^2-6x+9+y^2+4y+4=12+9+4
3.)(x-3)^2 + (y+2)^2= 25

Center:(3,-2)
Radius: 5