`= 2 sqrt 5 - 5 sqrt 5 - 4 sqrt 5 + 11 sqrt 5`
`= 4 sqrt 5`
`= 2 sqrt 5 - 5 sqrt 5 - 4 sqrt 5 + 11 sqrt 5`
`= 4 sqrt 5`
rút gọn biểu thức
A=2\(\sqrt{27}\)+5\(\sqrt{12}\)-3\(\sqrt{48}\)
B=\(\sqrt{147}\)+\(\sqrt{75}\)-4\(\sqrt{27}\)
C=3\(\sqrt{2}\)(4-\(\sqrt{2}\))+3(1-2\(\sqrt{2}\))2
D=2\(\sqrt{5}\)-\(\sqrt{125}\)-\(\sqrt{80}\)+\(\sqrt{605}\)
\(2\sqrt{5}\) - \(\sqrt{125}\) - \(\sqrt{80}\) + \(\sqrt{605}\)
thực hiện phép tính
rút gon các biểu thức sau:
a)\(\frac{\sqrt{a}-a}{\sqrt{a}-1}\)
b)\(\frac{a-\sqrt{b}}{\sqrt{b}}:\frac{\sqrt{b}}{a+\sqrt{b}}\)
c)\(2\sqrt{5}-\sqrt{125}-\sqrt{80}+\sqrt{605}\)
d)\(\left(\sqrt{28}-2\sqrt{14}+\sqrt{7}\right).\sqrt{7}+7\sqrt{8}\)
e)\(\sqrt{6+2\sqrt{5}}+\sqrt{6-2\sqrt{5}}\)
Rút gọn biểu thức
I=(2\(\sqrt{3}\)-5\(\sqrt{27}\)+4\(\sqrt{12}\)):\(\sqrt{3}\)
K=\(\sqrt{125}\)-4\(\sqrt{45}\)+3\(\sqrt{20}\)-\(\sqrt{80}\)
L=2\(\sqrt{9}\)+\(\sqrt{25}\)-5\(\sqrt{4}\)
N=2\(\sqrt{32}\)-5\(\sqrt{27}\)-4\(\sqrt{8}\)+3\(\sqrt{75}\)
O=2\(\sqrt{3.5^2}\)-3\(\sqrt{3.2^2}\)+\(\sqrt{3.3^2}\)
Rút gọn : \(D=\frac{2}{\sqrt{4+3\sqrt[4]{5}+2\sqrt{5}+\sqrt[4]{125}}}\)
Thực hiện phép tính:
a) \(2\sqrt{5}-\sqrt{125}-\sqrt{80}+\sqrt{605}\)
b) \(\sqrt{15-\sqrt{216}}+\sqrt{33-12\sqrt{6}}\)
c) \(\sqrt{8\sqrt{3}}-2\sqrt{25\sqrt{12}}+4\sqrt{\sqrt{192}}\)
(1) rút gọn biểu thức:
a) A= \(3\sqrt{2}+5\sqrt{8}-2\sqrt{50}\)
b) B= \(\sqrt{7-4\sqrt{3}}+\sqrt{12+6\sqrt{3}}\)
c) C= \(\dfrac{1}{3+\sqrt{5}}+\dfrac{1}{3-\sqrt{5}}\)
d) D= \(\sqrt[3]{27}-\sqrt[3]{-8}-\sqrt[3]{125}\)
giúp mk vs ạ mai mk hc rồi
rút gọn biểu thức : \(\dfrac{5-2\sqrt{5}}{\sqrt{5}}\) - ( \(5\sqrt{5}-3\) ) + \(\sqrt{80}\)
Rút gọn
\(\sqrt{5+2\sqrt{14\sqrt{5}-26}-\sqrt{4\sqrt{5}-1+\sqrt{80-8\sqrt{5}}}}\)
\(\frac{2}{\sqrt{4-3\sqrt[3]{5}+2\sqrt{5}-\sqrt[4]{125}}}.\)
rút gọn biểu thức