rút gọn ạaa
10) \(\dfrac{\sqrt{160}-\sqrt{80}}{\sqrt{8}-\sqrt{2}}-\dfrac{\sqrt{40}-\sqrt{15}}{2\sqrt{2}-\sqrt{3}}\)
\(=\dfrac{4\sqrt{10}-4\sqrt{5}}{2\sqrt{2}-\sqrt{2}}-\dfrac{\sqrt{5}\left(\sqrt{8}-\sqrt{3}\right)}{\sqrt{8}-\sqrt{3}}\)
\(=\dfrac{4\sqrt{5}\left(\sqrt{2}-1\right)}{\sqrt{2}}-\sqrt{5}=\dfrac{\sqrt{80}\left(\sqrt{2}-1\right)}{\sqrt{2}}-\sqrt{5}\)
\(=\sqrt{40}\left(\sqrt{2}-1\right)-\sqrt{5}\)
\(=4\sqrt{5}-2\sqrt{10}-\sqrt{5}=3\sqrt{5}-2\sqrt{10}\)
\(=\dfrac{\sqrt{80}\left(\sqrt{2}-1\right)}{\sqrt{2}}-\sqrt{5}\)
=căn 40(căn 2-1)-căn 5
=4*căn 5-2*căn 10-căn 5
=3*căn 5-2*căn 10
rút gọn ạ 
rút gọn ạ 
