\[y = \sqrt{3 - 2(4 + 5x)};\ \]
\[3 - 2(4 + 5x) \geq 0\]
\[3 - 8 - 10x \geq 0\]
\[- 10x \geq 5\]
\[x \leq - \frac{5}{10}\]
\[x \leq - 0,5.\]
\[Ответ:( - \infty; - 0,5\rbrack.\]