\[(x + 1)(x - 2)(2x + 5) \geq 0\]
\[x + 1 = 0\]
\[x = - 1\]
\[x - 2 = 0\]
\[x = 2\]
\[2x + 5 = 0\]
\[x = - 2,5\]
\[Ответ:\lbrack - 2,5;\ - 1\rbrack \cup \lbrack 2; + \infty).\]