Rút gọn C=3+căn5/2 căn5+căn(3+căn5) + 3-căn5/2 căn2-căn(3-căn5)
Rút gọn:
C=\(\dfrac{3+\sqrt{5}}{2\sqrt{5}+\sqrt[]{3+\sqrt{5}}}+\dfrac{3-\sqrt{5}}{2\sqrt{2}-\sqrt{3-\sqrt{5}}}\)
D=\(\dfrac{1+\sqrt{\dfrac{3}{2}}}{1+\sqrt{1+\dfrac{\sqrt{3}}{2}}}+\dfrac{1-\sqrt{\dfrac{3}{2}}}{1-\sqrt{1-\dfrac{\sqrt{3}}{2}}}\)