Use the Method of Completing the Square to Solve the Quadratic

Multiple Choice

Use the method of completing the square to solve the quadratic equation. x 2 + 20 x $-$ 25 = 0

A) $x = 5 \sqrt { 5 } \pm 20$
B) $x = 20 \pm 5 \sqrt { 5 }$
C) $x = - 10 \pm 5 \sqrt { 5 }$