\(=\sqrt{2}\left(\sqrt{5}-1\right)\left(3+\sqrt{5}\right)\left(\sqrt{9\left(3-\sqrt{5}\right)}\right)\)
\(=\left(\sqrt{5}-1\right)\left(3+\sqrt{5}\right)3\sqrt{6-2\sqrt{5}}\)
\(=3\left(\sqrt{5}-1\right)\left(3+\sqrt{5}\right)\sqrt{\left(\sqrt{5}-1\right)^2}\)
\(=3\left(\sqrt{5}-1\right)^2\left(3+\sqrt{5}\right)\)
\(=3\left(6-2\sqrt{5}\right)\left(3+\sqrt{5}\right)\)
\(=6\left(3-\sqrt{5}\right)\left(3+\sqrt{5}\right)\)
\(=6\left(9-5\right)=24\)




bài 2 câu 1,2,3,5,9





