$ \sqrt{\frac{25}{\pi}} = 2\sqrt{\frac{25}{4\pi}} = 2\sqrt{\frac{25}{4} \cdot \frac{1}{\pi}} = 2 \cdot \frac{5}{2} \cdot \frac{1}{\sqrt{\pi}} = \frac{5}{\sqrt{\pi}}$.
$ \sqrt{\frac{25}{\pi}} = 2\sqrt{\frac{25}{4\pi}} = 2\sqrt{\frac{25}{4} \cdot \frac{1}{\pi}} = 2 \cdot \frac{5}{2} \cdot \frac{1}{\sqrt{\pi}} = \frac{5}{\sqrt{\pi}}$.