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