\[\boxed{\text{313.}\text{\ }\text{ОК\ ГДЗ\ -\ домашка\ на\ 5}}\]
\[x^{2} - 13x - \sqrt{5 - x} =\]
\[= - \sqrt{5 - x} - 30\]
\[x^{2} - 13x + 30 = 0\]
\[x_{1} + x_{2} = 13;\ \ \ x_{1} \cdot x_{2} = 30\]
\[Ответ:x = 3.\]