Solve the Equation $$\left( 4 ^ { 3 x - 6 } \right) \left( 4 ^ { x + 4 } \right) = 64$$

Multiple Choice

Solve the equation. $$\left( 4 ^ { 3 x - 6 } \right) \left( 4 ^ { x + 4 } \right) = 64$$

A) $x = - \frac { 3 } { 4 }$
B) $x = - \frac { 5 } { 4 }$
C) $x = \frac { 5 } { 4 }$
D) $x = \frac { 1 } { 4 }$
E) $x = \frac { 9 } { 4 }$