.
\(\sqrt{14-6\sqrt{5}}+\sqrt{14+6\sqrt{5}}\)
Tính A = \(\left(5+2\sqrt{6}\right)^{14}+\left(5-2\sqrt{6}\right)^{14}\)
Rút gọn:
A=\(\sqrt{6-2\sqrt{5}}-\sqrt{6+2\sqrt{5}}\)
B=\(\sqrt{9+4\sqrt{5}}-\sqrt{9-4\sqrt{5}}\)
C=\(\sqrt{14-6\sqrt{5}-\sqrt{14+6\sqrt{5}}}\)
1) (\(5\sqrt{3}+2\sqrt{3}\)) (\(2\sqrt{3}-5\sqrt{2}\))
2) \(\sqrt{5+2\sqrt{ }6}-\sqrt{5-2\sqrt{ }6}\)
3)\(\sqrt{14}-6\sqrt{5}+\sqrt{14+6\sqrt{ }5}\)
Tính: √(14-6√5)
Thực hiện phép tính:
a) \(\sqrt{21-6\sqrt{6}}\).
b) \(\sqrt{55-6\sqrt{6.}}\)
c) \(\sqrt{3+\sqrt{5}.}\)
d) \(\sqrt{14-6\sqrt{5}}+\sqrt{14+6\sqrt{5}}\)
\(\dfrac{15}{\sqrt{6}-1}+\dfrac{8}{\sqrt{6}+2}+\dfrac{6}{3-\sqrt{6}}-9\sqrt{6}\)
\(\sqrt{\left(\sqrt{5}-1\right)\sqrt{14-6\sqrt{5}}}\)
a)\(\sqrt{25-4\sqrt{10-4\sqrt{15+4\sqrt{3}}}}\)
b)\(\sqrt{14-6\sqrt{5+\sqrt{14+6\sqrt{5}}}}\)
c)
b) \(\sqrt{9-4\sqrt{5}}\) + \(\sqrt{14-6\sqrt{5}}\)