\(\sqrt{t} + \frac{m-t}{\sqrt{m} + \sqrt{t}} = \frac{\sqrt{t}(\sqrt{m} + \sqrt{t}) + m - t}{\sqrt{m} + \sqrt{t}} = \frac{\sqrt{mt} + t + m - t}{\sqrt{m} + \sqrt{t}} = \frac{\sqrt{mt} + m}{\sqrt{m} + \sqrt{t}} = \frac{\sqrt{m}(\sqrt{t} + \sqrt{m})}{\sqrt{m} + \sqrt{t}} = \sqrt{m}\)
При m = 361:
\(\sqrt{361} = 19\)
Ответ: 19