\[\boxed{\text{263.}\text{\ }\text{ОК\ ГДЗ\ -\ домашка\ на\ 5}}\]
\[x^{2} - x - 6 = 0\]
\[x^{2} = x + 6\]
\[y = x^{2};\ \ \ y = x + 6.\]
\[x = - 2;\ \ x = 3.\]
\[Ответ:x = - 2;\ \ x = 3.\]