Solve the Equation by Completing the Square $x ^ { 2 } + 12 x = - 26$

Multiple Choice

Solve the equation by completing the square.
- $x ^ { 2 } + 12 x = - 26$

A) $- 12 + \sqrt { 26 }$
B) $6 + \sqrt { 10 }$
C) $- 6 - \sqrt { 10 } , - 6 + \sqrt { 10 }$
D) $6 - \sqrt { 26 } , 6 + \sqrt { 26 }$