Solve the Equation $$3 e ^ { x } \left( e ^ { x } - 8 \right) = 5 e ^ { x } - 40$$

Multiple Choice

Solve the equation. Write the solution set with the exact solutions. Also give approximate solutions to 4
decimal places if necessary.
- $$3 e ^ { x } \left( e ^ { x } - 8 \right) = 5 e ^ { x } - 40$$

A) $\left\{ - \frac { 5 } { 3 } , - 8 \right\}$
B) $\left\{ \ln \left( \frac { 5 } { 3 } \right) , \ln ( 8 ) \right\} ; x \approx 0.5108 , x \approx 2.0794$
C) $\left\{ \frac { 5 } { 3 } , 8 \right\}$
D) { }