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

Multiple Choice

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

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