\[\left\{ \begin{matrix} \frac{x^{2} - 9}{2x^{2} + 3} > 0\ \ \ \ \ \ \ \ \\ \frac{2x - 4}{x^{2} - 2x - 8} < 0 \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ }\]
\[\left\{ \begin{matrix} (x - 3)(x + 3) > 0 \\ \frac{2 \cdot (x - 2)}{(x + 2)(x - 4)} < 0 \\ \end{matrix} \right.\ \]
\[Ответ:( - \infty; - 3) \cup (3;4).\]