A= $\frac{\sqrt[]{7+ \sqrt[]{5}} + \sqrt[]{7- \sqrt[]{5}}}{\sqrt[]{7+2\sqrt[]{11}}}$ -$\sqrt[]{3-2\sqrt[]{2}}$
B= $\frac{\sqrt[]{8-\sqrt[]{15}}}{\sqrt[]{30-\sqrt[]{2} }}$
C= $\frac{2\sqrt[]{3-\sqrt[]{3+\sqrt[]{13+\sqrt[]{48}}}}}{\sqrt[]{6}-\sqrt[]{2}}$
Loga
Sinh Học lớp 12
