1, Rút gọn
A=\( \sqrt{8+2\sqrt15}\)+\(\sqrt{8-2\sqrt15} \)-2\(\sqrt{6-2\sqrt5}\)
B=\(\sqrt{6+2\sqrt5-\sqrt13+\sqrt48}\)
2, Chứng minh
(\(\dfrac{3\sqrt2}{\sqrt27-3}\)-\(\dfrac{\sqrt150}{3}\))*\(\dfrac{1}{\sqrt6}\)=\(\frac{-4}{3}\)
Giúp mik vs. Mai mik phải nộp rồi