\[\sqrt{2x + 5} + \frac{4}{\sqrt{7 - x}}\]
\[\left\{ \begin{matrix} 2x + 5 \geq 0 \\ 7 - x > 0\ \ \\ \end{matrix} \right.\ \]
\[\left\{ \begin{matrix} 2x \geq - 5\ \\ - x > - 7 \\ \end{matrix} \right.\ \]
\[\left\{ \begin{matrix} x \geq - 2,5 \\ x < 7\ \ \ \ \ \ \ \\ \end{matrix} \right.\ \]
\[- 2,5 \leq x < 7.\]
\[Ответ:при - 2,5 \leq x < 7.\]