Od a) do c) :
[tex]a] \ 2\sqrt{32}+4\sqrt2=2\sqrt{16\cdot2}+4\sqrt2=2\cdot4\sqrt2+4\sqrt2=12\sqrt2\\\\b] \ \sqrt{45}-\sqrt5=\sqrt{9\cdot5}-\sqrt5=3\sqrt5-\sqrt5=2\sqrt5\\\\c] \ 2\sqrt{27}+\sqrt{12}=2\sqrt{9\cdot3}+\sqrt{4\cdot3}=2\cdot3\sqrt3+2\sqrt3=8\sqrt3[/tex]
Od d) do f) :
[tex]d] \ 7\sqrt{32}-2\sqrt{18}=7\sqrt{16\cdot2}-2\sqrt{9\cdot2}=7\cdot4\sqrt2-2\cdot3\sqrt2=28\sqrt2-6\sqrt2=22\sqrt2\\\\e] \ 2\sqrt[3]{81}+\sqrt[3]{24}=2\sqrt[3]{27\cdot3}+\sqrt[3]{8\cdot3}=2\cdot3\sqrt[3]3+2\sqrt[3]3=8\sqrt[3]3\\\\f] \ 7\sqrt[3]{16}-2\sqrt[3]{54}=7\sqrt[3]{8\cdot2}-2\sqrt[3]{27\cdot2}=7\cdot2\sqrt[3]2-2\cdot3\sqrt[3]2=14\sqrt[3]2-6\sqrt[3]2=8\sqrt[3]2[/tex]
