Question

Mn ơi giúp em với ạ

Answer 1

13:

\(A=\dfrac{2\sqrt{2}\left(\sqrt{3}+1\right)}{3\sqrt{2+\sqrt{3}}}=\dfrac{4\left(\sqrt{3}+1\right)}{3\left(\sqrt{3}+1\right)}=\dfrac{4}{3}\)

14:

\(=\dfrac{8\sqrt{41}}{\sqrt{41}+2+\sqrt{41}-2}=4\)