\(=\sqrt{\left(5-2\sqrt{3}\right)^2}+\sqrt{\left(5+2\sqrt{3}\right)^2}\)
\(=\left|5-2\sqrt{3}\right|+\left|5+2\sqrt{3}\right|\)
\(=5-2\sqrt{3}+5+2\sqrt{3}\)
\(=10\)
\(=\sqrt{\left(5-2\sqrt{3}\right)^2}+\sqrt{\left(5+2\sqrt{3}\right)^2}\)
\(=\left|5-2\sqrt{3}\right|+\left|5+2\sqrt{3}\right|\)
\(=5-2\sqrt{3}+5+2\sqrt{3}\)
\(=10\)
1. Rút gọn các biểu thức sau:
E = \(\sqrt{37-6\sqrt{30}}\)
F = \(\sqrt{51-6\sqrt{30}}\)
G = \(\sqrt{59-6\sqrt{30}}\)
H = \(\sqrt{17-2\sqrt{30}}\)
\(2\sqrt{37+20\sqrt{3}}\) - \(\sqrt{73-40\sqrt{3}}\)
Lời giải tri tiết
rút gọn biểu thức: \(2\sqrt{20}-\sqrt{50}-3\sqrt{80}-\sqrt{320}\)
\(\sqrt{7-4\sqrt{3}}\) + \(\sqrt{12+6\sqrt{3}}\)
rút gọn biểu thức trên
rút gọn biểu thức
\(\dfrac{3+2\sqrt{3}}{\sqrt{3}}+\dfrac{2+\sqrt{2}}{1+\sqrt{2}}-\dfrac{1}{2-\sqrt{3}}\)
\(\sqrt{3+2\sqrt{2}}-\sqrt{3-2\sqrt{2}}\)
\(\dfrac{1}{\sqrt{3}-1}-\dfrac{1}{\sqrt{3}+1}\)
\(2\sqrt{5}-3\sqrt{45}+\sqrt{500}\)
\(\dfrac{1}{\sqrt{3}+\sqrt{2}}-\dfrac{\sqrt{15}-\sqrt{12}}{\sqrt{5}-2}\)
\(\dfrac{1}{2+\sqrt{3}}-\dfrac{1}{2-\sqrt{3}}+5\sqrt{3}\)
\(\sqrt{3}-\sqrt{4+2\sqrt{3}}\)
\(\dfrac{5-\sqrt{5}}{\sqrt{5}-1}-\dfrac{4}{\sqrt{5}+1}\)
\(\sqrt{37-20\sqrt{3}+\sqrt{37+20\sqrt{3}}}\)
rút gọn biểu thức
\(\dfrac{\sqrt{2}}{\sqrt{5+1}}-\sqrt{\dfrac{2}{3-\sqrt{5}}}\)
( \(\dfrac{3\sqrt{x}+6}{x-4}\) + \(\dfrac{\sqrt{x}}{\sqrt{x}-2}\) ) : \(\dfrac{x-9}{\sqrt{x}-3}\)
rút gọn biểu thức
rút gọn các biểu thức sau:
a,\(\sqrt{\sqrt{5}-\sqrt{3-\sqrt{29-12\sqrt{5}}}}\)
b,\(\sqrt{6+2\sqrt{5}-\sqrt{29-12\sqrt{5}}}\)
c,\(\sqrt{2+\sqrt{5-\sqrt{13-\sqrt{48}}}}\)
d,\(\left(3-\sqrt{5}\right)\sqrt{3+\sqrt{5}}+\left(3+\sqrt{5}\right)\sqrt{3-\sqrt{5}}\)