Odpowiedź :
[tex]Zadanie\\\\\frac{3\sqrt{20}\cdot\sqrt{5} }{6}=\frac{3\sqrt{4\cdot5}\cdot\sqrt{5} }{6}= \frac{6\sqrt{5}\cdot\sqrt{5} }{6}=\sqrt{5}\cdot\sqrt{5}=5[/tex]
[tex]Zadanie\\\\\frac{3\sqrt{20}\cdot\sqrt{5} }{6}=\frac{3\sqrt{4\cdot5}\cdot\sqrt{5} }{6}= \frac{6\sqrt{5}\cdot\sqrt{5} }{6}=\sqrt{5}\cdot\sqrt{5}=5[/tex]