\[- 2x^{2} - 5x - 2 = 0\ \]
\[D = 25 - 16 = 9\]
\[x_{1,2} = \frac{5 \pm 3}{- 4}\]
\[x_{1} = \frac{8}{- 4} = - 2;\ \ \ \ \]
\[x_{2} = \frac{2}{- 4} = - \frac{1}{2}.\]