\[x^{2} - 2x + \sqrt{3 - x} = \sqrt{3 - x} + 8.\]
\[x^{2} - 2x - 8 = 0\]
\[ОДЗ:3 - x > 0;x < 3.\]
\[D_{1} = 1 + 8 = 9\]
\[x_{1} = 1 + 3 = 4 > 3;\ \]
\[x_{2} = 1 - 3 = - 2.\]
\[Ответ:x = - 2.\]