\[(x + 3)(2x - 6)(3x + 4) \geq 0\]
\[x = - 3;\ \ x = 3;\ \ \ x = - \frac{4}{3}\]
\[Ответ:x \in \left\lbrack - 3;\ - 1\frac{1}{3} \right\rbrack \cup \lbrack 3; + \infty).\]