\(=\sqrt{9+4\sqrt{3}+4}\)
= \(\sqrt{\left(\sqrt{3}+2\right)^2}\)
=\(\sqrt{3}+2\)
\(\sqrt{9+4+4\sqrt{3}}\)
\(=\sqrt{\left(\sqrt{3}+2\right)^2}\)
\(=\sqrt{3}+2\)
= \(\sqrt{12+4\sqrt{3}+1}\)
=\(\sqrt{\left(2\sqrt{3}+1\right)^2}\)
=2\(\sqrt{3}\)+1
đây ms đúng nek mấy bn