\[\frac{1}{(x - 3)^{2}} + \frac{9}{(x + 3)^{2}} - \frac{6}{x^{2} - 9} =\]
\[= 0\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \]
\[ОДЗ:\ \ x \neq \pm 3\]
\[4x² - 48x + 144 = 0\ \ \ \ |\ :4\]
\[x^{2} - 12x + 36 = 0\]
\[D = b^{2} - 4ac =\]
\[= 144 - 4 \cdot 1 \cdot 36 =\]
\[= 144 - 144 = 0\]
\[x = \frac{12}{2} = 6\]
\[Ответ:x = 6.\]