Hej!
[tex]a] \ \sqrt{18}:\sqrt{\frac{2}{9}}=\sqrt{18:\frac{2}{9}}=\sqrt{18\cdot\frac{9}{2}}=\sqrt{81}=9\\\\b] \ 3\sqrt{32}-\sqrt{18}-\sqrt8=3\sqrt{16\cdot2}-\sqrt{9\cdot2}-\sqrt{4\cdot2}=\\\\=12\sqrt2-3\sqrt2-2\sqrt2=7\sqrt2\\\\c] \ (4\sqrt[3]{24}-\sqrt[3]3+\sqrt[3]{81}):\sqrt[3]3=4\sqrt[3]{24}:\sqrt[3]3-\sqrt[3]3:\sqrt[3]3+\sqrt[3]{81}:\sqrt[3]3=\\\\=4\cdot\sqrt[3]8-\sqrt[3]1+\sqrt[3]{27}=4\cdot2-1+3=8+2=10[/tex]
Pozdrawiam! - Julka
