A. [tex]\left ( \sqrt{5-2\sqrt{6}}+\sqrt{2} \right )×3[/tex]
B.[tex]\sqrt{6-2\sqrt{5-\sqrt{13+4\sqrt{3}}}}[/tex]
[tex]\sqrt{6-2\sqrt{5-\sqrt{13+4\sqrt{3}}}}[/tex]
=[tex]\sqrt{6-2\sqrt{5-\sqrt{12+4\sqrt{3}+1}}}[/tex]
=[tex]\sqrt{6-2\sqrt{5-\sqrt{(2\sqrt{3}+1)^{2}}}}[/tex]
=[tex]\sqrt{6-2\sqrt{5-(2\sqrt{3}+1)}}[/tex]
=[tex]\sqrt{6-2\sqrt{3+2\sqrt{3}+1}}[/tex]
=[tex]\sqrt{6-2\sqrt{(\sqrt{3}+1)^{2}}}[/tex]
=[tex]\sqrt{6-2(\sqrt{3}+1)}[/tex]
=[tex]\sqrt{6-2\sqrt{3}-2}[/tex]
=[tex]\sqrt{3+2\sqrt{3}+1}[/tex]
=[tex]\sqrt{3}+1[/tex]