\[10x^{2} - 6x - 16 = 0\ \ \ \ \ \ \ \ |\ :2\]
\[5x² - 3x - 8 = 0\]
\[D = 9 + 160 = 169\]
\[x_{1} = \frac{3 + 13}{10} = \frac{16}{10} = 1,6;\ \ \ \ \]
\[x_{2} = \frac{3 - 13}{10} = - 1.\]
\[Ответ:\ x = - 1;\ x = 1,6.\]