Rút gọn biểu thức: B = \(\sqrt{5}\left(\sqrt{20}-\sqrt{8}\right)+2\sqrt{10}\)
rút gọn
\(\sqrt{8+2\sqrt{10+2\sqrt{5}}}-\sqrt{8-2\sqrt{10+2\sqrt{5}}}\)
Rút gọn:
\(C=\sqrt{8+2\sqrt{10+2\sqrt{5}}}\sqrt{8-2\sqrt{10+2\sqrt{5}}}\)
Rút gọn:
A= \(\sqrt{8+2\sqrt{10+2\sqrt{5}}}+\sqrt{8-2\sqrt{10+2\sqrt{5}}}\)
Rút gọn \(\frac{\sqrt{7-2\sqrt{10}}\left(7+2\sqrt{10}\right)\left(74-22\sqrt{10}\right)}{\sqrt{125}-4\sqrt{50}+5\sqrt{20}+\sqrt{8}}\)
rút gọn Q= ($\frac{\sqrt{x+2} }{x-2\sqrt{x}+4 }$ - $\frac{x-\sqrt{x} }{x\sqrt{x} +8 }$ ). $\frac{5x-10\sqrt{x}+20 }{5\sqrt{x}+4}$
Rút gọn \(\sqrt{8+2\sqrt{10+2\sqrt{5}}}+\sqrt{8-2\sqrt{10-2\sqrt{5}}}\)
Rút gọn \(A=\sqrt{8+2\cdot\sqrt{10+2\cdot\sqrt{5}}}+\sqrt{8-2\cdot\sqrt{10-2\cdot\sqrt{5}}}\)
5.Rút gọn:
B= \(\sqrt{6-2\sqrt{\sqrt{2}+\sqrt{12}+\sqrt{18-8\sqrt{2}}}}\)
6.Rút gọn:
A= \(\sqrt{4+\sqrt{10+2\sqrt{5}}}+\sqrt{4-\sqrt{10+2\sqrt{5}}}\)