\[5x² - 12x - 7 = 0\]
\[x_{1} + x_{2} = \frac{12}{5} = 2\frac{2}{5} = 2,4;\ \ \]
\[x_{1} \cdot x_{2} = - \frac{7}{5} = - 1\frac{2}{5} = - 1,4.\]