\[(x + 2)(x - 1)(3x - 7) \leq 0\]
\[x + 2 = 0\]
\[x = - 2\]
\[x - 1 = 0\]
\[x = 1\]
\[3x - 7 = 0\]
\[x = 2\frac{1}{3}\]
\[Ответ:( - \infty; - 2\rbrack\left\lbrack 1;2\frac{1}{3} \right\rbrack.\]