Solve $x ^ { 2 } - 10 x - 4 = 0$

Multiple Choice

Solve $x ^ { 2 } - 10 x - 4 = 0$ by completing the square.

A) $\{ 5 \pm \sqrt { 89 } \}$
B) $\{ - 5 \pm \sqrt { 89 } \}$
C) $\{ 5 \pm \sqrt { 29 } \}$
D) $\{ - 5 \pm \sqrt { 29 } \}$