\[10x² - x - 60 = 0\]
\[D = 1 + 2400 = 2401 = 49²\]
\[x_{1,2} = \frac{1 \pm 49}{20}\]
\[x_{1} = \frac{5}{2};\ \ \ x_{2} = - 2,4\]
\[Ответ:2,5;\ - 2,4.\]