Solve the Equation $$3 ^ { x ^ { 2 } - 7 } = 9$$

Multiple Choice

Solve the equation. Write the solution set with the exact solutions. Also give approximate solutions to 4
decimal places if necessary.
- $$3 ^ { x ^ { 2 } - 7 } = 9$$

A) $\{ 3 \}$
B) { }
C) $\{ 3 , - 3 \}$
D) $\{ - 3 \}$