Solve the Inequality $$\mathrm { x } ^ { 2 } + 3 \mathrm { x } - 18 < 0$$

Solve the inequality. Write the solution set in interval notation.
- $$\mathrm { x } ^ { 2 } + 3 \mathrm { x } - 18 < 0$$

A) $( - 3,6 )$
B) $( - \infty , - 6 ) \cup ( 3 , \infty )$
C) $( - 6,3 )$
D) $( - \infty , - 3 ) \cup ( 6 , \infty )$