Solve for the Specified Variable $x ^ { 2 } - 2 c x - 8 c ^ { 2 } = 0$

Multiple Choice

Solve for the specified variable. Assume that all other variables are nonzero
- $x ^ { 2 } - 2 c x - 8 c ^ { 2 } = 0$ ; for $x$

A) $\mathrm { x } = 2 \mathrm { c } , - 4 \mathrm { c }$
B) $x = - 2 c , 4 c$
C) $x = \pm \sqrt { 8 c ^ { 2 } - 2 c x }$
D) $x = \pm \sqrt { 8 \mathrm { c } ^ { 2 } + 2 \mathrm { cx } }$