1 thực hienj phép tính 4. rút gọn
\(\sqrt{\left(3-\sqrt{10}\right)^2}+\sqrt{\left(2\sqrt{10}-6\right)^2}\) \(x\sqrt{\frac{9}{x}}+5\sqrt{x}\left(x>0\right)\)
2, tính \(\sqrt{2}.\sqrt{18};\frac{\sqrt{108a}}{\sqrt{3a}}\left(a>0\right)\)
: \(2\sqrt{56}-14\sqrt{\frac{2}{7}}\left(\sqrt{7}-\sqrt{2}\right)\sqrt{7}-\frac{8\sqrt{2}}{\sqrt{3}-\sqrt{7}}\) (tính giá trị)