[tex]A=\frac{1}{\sqrt{2}+\sqrt[3]{4}}=\frac{(\sqrt{2}^2-\sqrt{2}.\sqrt[3]{4}+\sqrt[3]{4}^2)}{(\sqrt{2}+\sqrt[3]{4})((\sqrt{2}^2-\sqrt{2}.\sqrt[3]{4}+\sqrt[3]{4}^2))}=\frac{(\sqrt{2}^2-\sqrt{2}.\sqrt[3]{4}+\sqrt[3]{4}^2)}{2\sqrt{2}+4}=\frac{1-\sqrt[6]{2}+\sqrt[3]{2}}{2+\sqrt{2}}=\frac{(2-\sqrt{2})(1-\sqrt[6]{2}+\sqrt[3]{2})}{(2-\sqrt{2})(2+\sqrt{2})}=\frac{2-2\sqrt[6]{2}+2\sqrt[3]{2}-\sqrt{2}+\sqrt[3]{2^2}-\sqrt[6]{2^5}}{2}[/tex]
trục căn thức nhìn đau mắt hơn nhiều :3