CPM Homework Help : INT2 Problem 10-41

Describe each circle by stating the center and radius. Complete the square to rewrite the equation in part (b) in graphing form.

$(x - 2)^2 + (y + 3)^2 = 25$
Hint (a):
The equation for a circle is $(x - h)^² + (y - k)^² = r^²$
where $(h, k)$ is the center of the circle.

$x^2 + 2x + y^2 + 6y - 6 = 0$
Hint (b):
Put the equation into graphing form then refer to part (a) for help.
Answer (b):
$(-1, -3)$ , $r = 4$