Answer:
Step-by-step explanation:
[tex]2\sqrt{45}+2\sqrt{20}=2\sqrt{3*3*5}+2\sqrt{2*2*5}\\\\ =2*3\sqrt{5}+2*2\sqrt{5}\\\\=6\sqrt{5}+4\sqrt{5}\\\\=10\sqrt{5}[/tex]
