Chào em, em cần hỗ trợ bài nào?
Bài 5:
9: \(\dfrac{3-\sqrt{3}}{3\sqrt{3}}=\dfrac{\sqrt{3}-1}{3}\)
10: \(\dfrac{2\sqrt{3}-\sqrt{6}}{5\sqrt{3}}=\dfrac{2-\sqrt{2}}{5}\)
13: \(\dfrac{5-2\sqrt{5}}{-\left(\sqrt{5}-2\right)}=\dfrac{\sqrt{5}\left(\sqrt{5}-2\right)}{-\left(\sqrt{5}-2\right)}=-\sqrt{5}\)
14: \(\dfrac{4\sqrt{13}-13}{\sqrt{13}-4}=-\sqrt{13}\)
17: \(\dfrac{5\sqrt{6}-6\sqrt{5}}{\sqrt{6}-\sqrt{5}}=-\sqrt{30}\)
18: \(\dfrac{2\sqrt{5}-5\sqrt{2}}{\sqrt{10}}=\sqrt{2}-\sqrt{5}\)