Bài 1: rút gọn
I=\(\sqrt{4+\sqrt{10+2\sqrt{5}}}+\sqrt{4-\sqrt{10+2\sqrt{5}}}\)
K=\(\sqrt{94-42\sqrt{5}}-\sqrt{94+42\sqrt{5}}\)
Bài 2: tính
Y=\(2+\sqrt{17-4\sqrt{9+4\sqrt{5}}}\)
Z=\(\sqrt[3]{7+5\sqrt{2}}+\sqrt[3]{7-5\sqrt{2}}\)
T=\(\sqrt{3-\sqrt{5}}\left(3+\sqrt{5}\right)\left(\sqrt{10}-\sqrt{2}\right)\)