Solve the Equation $$\left| x ^ { 2 } + 9 \right| = | 6 x |$$

Multiple Choice

Solve the equation.
- $$\left| x ^ { 2 } + 9 \right| = | 6 x |$$

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