Rewrite the expression in terms of exponentials and simplify the results.
-$\cosh 9 x - \sinh 9 x$
A) $- 9 x$
B) $e ^ { 9 x } - e ^ { - 9 x }$
C) $\mathrm { e } ^ { - 9 \mathrm { x } }$
D) $2 e ^ { - 9 x }$

Question

Quizplus · Accepted Answer

The Answer of Rewrite the expression in terms of exponentials and simplify the results.
-$\cosh 9 x - \sinh 9 x$
A) $- 9 x$
B) $e ^ { 9 x } - e ^ { - 9 x }$
C) $\mathrm { e } ^ { - 9 \mathrm { x } }$
D) $2 e ^ { - 9 x }$

Rewrite the Expression in Terms of Exponentials and Simplify the Results