\[(x + 2)(3x - 6)(2x + 9) \leq 0\]
\[3 \cdot 2(x + 2)(x - 2)(x + 4,5) \leq 0\]
\[(x + 4,5)(x + 2)(x - 2) \leq 0\]
\[x \leq - 4,5;\ - 2 \leq x \leq 2.\]
\[Ответ:x \leq - 4,5;\ - 2 \leq x \leq 2.\ \]