Question

căn 27 -3 căn 48 +2 căn 108 - căn ( 2-căn 3 )^2

Answer 1

\(\sqrt{27}-3\sqrt{48}+2\sqrt{108}-\sqrt{2-\sqrt{3}}^2=3\sqrt{3}-12\sqrt{3}+12\sqrt{3}-2+\sqrt{3}=3\sqrt{3}-2+\sqrt{3}=4\sqrt{3}-2=2\left(2\sqrt{3}-1\right)\)

Answer 2

Ta có: \(\sqrt{27}-3\sqrt{48}+2\sqrt{108}-\sqrt{\left(2-\sqrt{3}\right)^2}\)

\(=3\sqrt{3}-12\sqrt{3}+12\sqrt{3}-2+\sqrt{3}\)

\(=2\sqrt{3}-2\)