\[g(x) = x^{2} + 4x + 2\]
\[g(x) = 0:\]
\[x = - 3,5;x = - 0,5.\]
\[g(x) < 0\ \ при\ \ \ \]
\[- 3,5 < x < - 0,5;\]
\[g(x) > 0\ \ при\ \]
\[x < - 3,5;\ \ x > - 0,5.\]