\[\left( 9 - x^{2} \right)(6x + 30) < 0\]
\[\left( x^{2} - 9 \right)(6x + 30) > 0\]
\[6 \cdot (x + 5)(x + 3)(x - 3) > 0\]
\[- 5 < x < - 3;\ \ x > 3.\]