\[y = \sqrt{2x^{2} - 5x + 2} + \frac{8}{x^{2} - 9}\]
\[\left\{ \begin{matrix}
2x² - 5x + 2 \geq 0\ \ \ \ \ \ \ \ \ \ \ \\
x² - 9
eq 0,\ \ x
eq \pm 3 \\
\end{matrix} \right.\ \]
\[2x^{2} - 5x + 2 = 0\]
\[D = 25 - 16 = 9\]
\[x_{1} = \frac{5 + 3}{4} = 2\]
\[x_{2} = \frac{5 - 3}{4} = 0,5\]