\[\frac{x\sqrt{7} + \sqrt{2}}{x\sqrt{7} - \sqrt{2}} + \frac{x\sqrt{7} - \sqrt{2}}{x\sqrt{7} + \sqrt{2}} =\]
\[= \frac{x}{7x² - 2}\]
\[ОДЗ:\ \ x\sqrt{7} - \sqrt{2} \neq 0\]
\[\text{\ \ \ \ \ \ \ \ \ \ x}\sqrt{7} + \sqrt{2} \neq 0\]
\[\frac{\left( x\sqrt{7} + \sqrt{2} \right)^{2} + \left( x\sqrt{7} - \sqrt{2} \right)^{2}}{7x^{2} - 2} =\]
\[= \frac{x}{7x^{2} - 2}\]
\[14x^{2} + 4 - x = 0\]
\[D = b^{2} - 4ac =\]
\[= 1 - 4 \cdot 4 \cdot 14 < 0\]
\[Ответ:нет\ корней.\]