Write the Equation in Factored Form to Find the Center

Write the equation in factored form to find the center and radius of the circle. Then sketch the graph. x² + y² + 6x - 8 = 0

A) (x + 3) ² + y² = 16

(Gridlines are spaced one unit apart.)
B) (x + 3) ² + y² = 17

(Gridlines are spaced one unit apart.)
C) (x - 3) ² + y² = 16

(Gridlines are spaced one unit apart.)
D) (x - 3) ² + y² = 17

(Gridlines are spaced one unit apart.)