3:
a: \(A=5\sqrt{3}-\dfrac{1}{2}\cdot4\sqrt{3}+10\sqrt{3}-7\sqrt{3}\)
=8căn 3-2căn 3
=6căn 3
1:
a: \(=4\sqrt{3}+3\sqrt{3}-3\sqrt{5}+\sqrt{5}\)
=7căn 3-2căn 5
b: \(=\sqrt{2+\sqrt{\left(2\sqrt{2}+1\right)^2}}\)
\(=\sqrt{2+2\sqrt{2}+1}=\sqrt{\left(\sqrt{2}+1\right)^2}=\sqrt{2}+1\)
c: =2căn 5-3căn 5+3*3căn 2+6căn 2
=15căn 2-căn 5
d:
\(=\sqrt{5-\sqrt{\left(2\sqrt{3}+1\right)^2}}\)
\(=\sqrt{5-2\sqrt{3}-1}=\sqrt{4-2\sqrt{3}}=\sqrt{3}-1\)
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