\[3x² - 8x - 14 = 0\ \]
\[\left\{ \begin{matrix}x_{1} + x_{2} = \frac{8}{3} = 2\frac{2}{3}\text{\ \ \ \ \ \ \ } \\x_{1} \cdot x_{2} = - \frac{14}{3} = - 4\frac{2}{3} \\\end{matrix} \right.\ \]
\[Ответ:\ 2\frac{2}{3};\ - 4\frac{2}{3}.\]