Выражение: \[ \frac{(9x + y)^2 - (9x - y)^2}{x} \]
При \( x = \sqrt{29} \) и \( y = -5 \):
\[ \frac{(9\sqrt{29} - 5)^2 - (9\sqrt{29} - (-5))^2}{\sqrt{29}} \]
\[ = \frac{(9\sqrt{29} - 5)^2 - (9\sqrt{29} + 5)^2}{\sqrt{29}} \]
\[ = \frac{(81 \cdot 29 - 90\sqrt{29} + 25) - (81 \cdot 29 + 90\sqrt{29} + 25)}{\sqrt{29}} \]
\[ = \frac{2349 - 90\sqrt{29} + 25 - 2349 - 90\sqrt{29} - 25}{\sqrt{29}} \]
\[ = \frac{-180\sqrt{29}}{\sqrt{29}} \]
\[ = -180 \]
Ответ: -180