Solve the Equation by Completing the Square $4 x ^ { 2 } = 20 - 32 x$

Multiple Choice

Solve the equation by completing the square. $4 x ^ { 2 } = 20 - 32 x$

A) $x = 32$ , $x = - \sqrt { 6 }$
B) $x = - 4 \pm \sqrt { 21 }$
C) $x = 6 \pm \sqrt { 6 }$
D) $x = 4 \pm \sqrt { 21 }$
E) $x = 4$ , $x = - 4$