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[TEX]a, A=(4+sqrt{15}(sqrt{10}-sqrt{6})sqrt{4-\sqrt{15}}[/TEX]
[TEX]b, B=(3-\sqrt{5})\sqrt{{3}+\sqrt{5}}+(3+\sqrt{5})\sqrt{{3}-\sqrt{5}}[/TEX]
[TEX]c,C=\sqrt{2+\sqrt{3}}.\sqrt{{2}+\sqrt{2+\sqrt{3}}}.\sqrt{{2}+\sqrt{2+\sqrt{2+\sqrt{3} }}}.\sqrt{{2-\sqrt{2+\sqrt{{2}+\sqrt{3}}}[/TEX]
P/s: đánh xong gãy tay, hoa mắt luôn. :|
[TEX]b, B=(3-\sqrt{5})\sqrt{{3}+\sqrt{5}}+(3+\sqrt{5})\sqrt{{3}-\sqrt{5}}[/TEX]
[TEX]c,C=\sqrt{2+\sqrt{3}}.\sqrt{{2}+\sqrt{2+\sqrt{3}}}.\sqrt{{2}+\sqrt{2+\sqrt{2+\sqrt{3} }}}.\sqrt{{2-\sqrt{2+\sqrt{{2}+\sqrt{3}}}[/TEX]
P/s: đánh xong gãy tay, hoa mắt luôn. :|