a: \(=\sqrt{3.6\cdot10}=6\)
b: \(=\sqrt{\left(21.8-18.2\right)\left(21.8+18.2\right)}=\sqrt{40\cdot3.6}=12\)
c: \(=\sqrt{\left(117.5-26.5\right)\left(117.5+26.5\right)-1440}\)
\(=\sqrt{144\cdot91-1440}=\sqrt{144\cdot81}=12\cdot9=108\)
a: \(=\sqrt{3.6\cdot10}=6\)
b: \(=\sqrt{\left(21.8-18.2\right)\left(21.8+18.2\right)}=\sqrt{40\cdot3.6}=12\)
c: \(=\sqrt{\left(117.5-26.5\right)\left(117.5+26.5\right)-1440}\)
\(=\sqrt{144\cdot91-1440}=\sqrt{144\cdot81}=12\cdot9=108\)
Rút gọn rồi tính:
a.\(\sqrt{117,5^2-26,5^2-1440}\)
b, \(\sqrt{146,5^2-109,5^2+27.256}\)
Mong mọi người giúp đỡ
\(\sqrt{117,5^2-26,5^2-1440}\)
\(\frac{\sqrt{12,5}}{\sqrt{0,5}}\)
\(\frac{\sqrt{6}}{\sqrt{150}}\)
\(\sqrt{6,8^2-3,2^2}\)
\(\sqrt{21,8^2-18,2^2}\)
Rút gọn rồi tính @@
\(\sqrt{146,5^2-109,5^2+27,256}\)
rút gọn biểu thức
A=2015+\(\sqrt{36}\)-\(\sqrt{25}\)
B=5\(\sqrt{8}\)+\(\sqrt{50}\)-2\(\sqrt{18}\)
C=\(\sqrt{27}\)-2\(\sqrt{12}\)-\(\sqrt{75}\)
D=\(\sqrt{12}\)+\(\sqrt{27}\)-\(\sqrt{48}\)
Rút gọn rồi tính
a)\(\sqrt{117.5^2-26.5^2-1440}\)
b)\(\sqrt{146.5^2-109.5^2+27.256}\)
Rút gọn rồi tính
a)\(\sqrt{117.5^2-26.5^2-1440}\)
b)\(\sqrt{146.5^2-109.5^2+27.256}\)
Rút gọn biểu thức
A= \(\sqrt{\left(2-\sqrt{3}\right)^2}\)+\(\sqrt{3}\)
B=\(\sqrt{6+2\sqrt{5}}\)-\(\sqrt{6-2\sqrt{5}}\)
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\(\sqrt{5}\)-\(\sqrt{125}\)-\(\sqrt{80}\)+\(\sqrt{605}\)
Rút gọn biểu thức
A= \(2\sqrt{27}-\sqrt{\left(1-\sqrt{3}\right)^2}+\dfrac{1}{2-\sqrt{3}}\)
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