Biểu thức đã cho bằng:
\(\sqrt{12+4\sqrt{3}+1}+\sqrt{\frac{2\left(2-\sqrt{3}\right)}{\left(2+\sqrt{3}\right)\left(2-\sqrt{3}\right)}}\)
\(=\sqrt{\left(2\sqrt{3}\right)^2+2.2\sqrt{3}+1}+\sqrt{4-2\sqrt{3}}\)
\(=\sqrt{\left(2\sqrt{3}+1\right)^2}+\sqrt{3+2.\sqrt{3}+1}\)
\(=2\sqrt{3}+1+\sqrt{\left(\sqrt{3}-1\right)^2}\)
\(=2\sqrt{3}+1+\sqrt{3}-1\)
\(=3\sqrt{3}\)