[tex]4\sqrt{5}-\sqrt{80}-2\sqrt{5}+\sqrt{125} =4\sqrt{5}-\sqrt{16\cdot5}-2\sqrt{5}+\sqrt{25\cdot5} =\\\\=4\sqrt{5}-\sqrt{16}\cdot\sqrt{5}-2\sqrt{5}+\sqrt{25}\cdot\sqrt{5} =4\sqrt{5}-4\sqrt{5}-2\sqrt{5}+5\sqrt{5} = \boxed{3\sqrt{5}}\\\\\underline{Odp. \ A.}[/tex]
