Odpowiedź i szczegółowe wyjaśnienie:
[tex]\sqrt{1\dfrac{9}{16}}:\sqrt{\dfrac{225}{256}}=\sqrt{\dfrac{25}{16}:\dfrac{225}{256}}=\sqrt{\dfrac{25}{16}\cdot\dfrac{256}{225}}=\sqrt{\dfrac{25}{16}\cdot\dfrac{16\cdot16}{25\cdot9}}=\sqrt{\dfrac{16}{9}}=\dfrac{4}{3}\\\\\\\sqrt{5\dfrac14}\cdot\sqrt{\dfrac73}=\sqrt{\dfrac{21}{4}\cdot\dfrac{7}{3}}=\sqrt{\dfrac{7\cdot3\cdot7}{4\cdot3}}=\sqrt{\dfrac{49}{4}}=\dfrac{7}{2}[/tex]
