\[x² - 14x + 33 = 0\ \]
\[D = 196 - 132 = 64\]
\[x_{1,2} = \frac{14 \pm 8}{2}\]
\[x_{1} = \frac{22}{2} = 11;\ \ \ \ x_{2} = \frac{6}{2} = 3.\]