\[5x² - 178x + 105 = 0\ \]
\[D = 31\ 684 - 2100 = 29\ 584\]
\[x_{1,2} = \frac{178 \pm 172}{10} = 35;\ \frac{3}{5}.\]
\[Ответы:\ 35;\ \frac{3}{5}\text{.\ }\]