14) 3 1/16 - 2 14/25

14) $$ \sqrt{3\frac{1}{16} \cdot 2\frac{14}{25}} = \sqrt{\frac{3 \cdot 16 + 1}{16} \cdot \frac{2 \cdot 25 + 14}{25}} = \sqrt{\frac{49}{16} \cdot \frac{64}{25}} = \sqrt{\frac{49}{16}} \cdot \sqrt{\frac{64}{25}} = \frac{\sqrt{49}}{\sqrt{16}} \cdot \frac{\sqrt{64}}{\sqrt{25}} = \frac{7}{4} \cdot \frac{8}{5} = \frac{7 \cdot 2}{5} = \frac{14}{5} = 2\frac{4}{5}$$

Ответ: 14/5