CPM Homework Help : INT2 Problem 10-18

Rewrite the equation $x^2 + y^2 - 8x + 6y + 9 = 0$ in graphing form and state the radius and center of the circle.

Hint:

Refer to the Math Notes box from this lesson.

More Help:

When completing the square, remember to add the new $c$ to both sides.

Answer:

The radius is $4$ units.