Solve by Completing the Square $$z ^ { 2 } + 4 z - 9 = 0$$

Multiple Choice

Solve by completing the square.
- $$z ^ { 2 } + 4 z - 9 = 0$$

A) $- 2 \pm \sqrt { 13 }$
B) $- 1 \pm \sqrt { 13 }$
C) $- 2 \pm 2 \sqrt { 13 }$
D) $2 + \sqrt { 13 }$