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\(c,=\left(2\sqrt{3}-6\sqrt{2}+5\sqrt{3}\right)\sqrt{3}+5\sqrt{6}\\ =\left(7\sqrt{3}-6\sqrt{2}\right)\sqrt{3}+5\sqrt{6}\\ =21-6\sqrt{6}+5\sqrt{6}=21-\sqrt{6}\\ f,=\sqrt{\dfrac{\left(\sqrt{3}-3\right)^2}{3-\sqrt{3}}}=\sqrt{\dfrac{\left(3-\sqrt{3}\right)^2}{3-\sqrt{3}}}=\sqrt{3-\sqrt{3}}\\ i,=\dfrac{7-4\sqrt{3}+7+4\sqrt{3}}{7^2-\left(4\sqrt{3}\right)^2}=\dfrac{14}{49-48}=\dfrac{14}{1}=14\)
\(e,=2\sqrt{3\cdot2}-2\sqrt{3}\cdot3+2^2-2\cdot2\cdot\sqrt{3}+\left(\sqrt{3}\right)^2+6\sqrt{3}\\ =2\sqrt{6}-6\sqrt{3}+4-4\sqrt{3}+3+6\sqrt{3}\\ =2\sqrt{6}-4\sqrt{3}+7\)
\(=2\sqrt{3.2}-3.2\sqrt{3}+2^2-2.2.\sqrt{3}+\left(\sqrt{3}\right)^2+6\sqrt{3}\)
\(=2\sqrt{6}-6\sqrt{3}+4-4\sqrt{3}+3+6\sqrt{3}\)
\(=2\sqrt{6}-4\sqrt{3}+7\)
e: \(=\left|3-\sqrt{2}\right|=3-\sqrt{2}\)
h: \(=3-\sqrt{2}+3+\sqrt{2}=6\)
g: \(=\left|0.1-\sqrt{0.1}\right|=0.1-\sqrt{0.1}\)
i: \(=\left|2\sqrt{2}-3\right|=3-2\sqrt{2}\)
c: \(=\left|2+5\right|=7\)
o: \(=5-2\sqrt{6}-5-2\sqrt{6}=-4\sqrt{6}\)
n: \(=4-2\sqrt{3}+4+2\sqrt{3}=8\)
m: \(=7+2\sqrt{10}-7-2\sqrt{10}=0\)
\(M=\left(\dfrac{15\left(\sqrt{6}-1\right)}{5}+\dfrac{4\left(\sqrt{6}+2\right)}{2}-\dfrac{12\left(3+\sqrt{6}\right)}{3}\right)\left(\sqrt{6}+1\right)\)
\(=\left(3\sqrt{6}-3+2\sqrt{6}+4-12-4\sqrt{6}\right)\left(\sqrt{6}+1\right)\)
\(=\left(\sqrt{6}-11\right)\left(\sqrt{6}+1\right)\)
\(=6+\sqrt{6}-11\sqrt{6}-11=-5-10\sqrt{6}\)
\(M=\left(\dfrac{15}{\sqrt{6}+1}+\dfrac{4}{\sqrt{6}-2}-\dfrac{12}{3-\sqrt{6}}\right)\left(\sqrt{6}+1\right)\)
\(M=\left[\dfrac{15\left(\sqrt{6}-1\right)}{\left(\sqrt{6}+1\right)\left(\sqrt{6}-1\right)}+\dfrac{4\left(\sqrt{6}+2\right)}{\left(\sqrt{6}+2\right)\left(\sqrt{6}-2\right)}-\dfrac{12\left(3+\sqrt{6}\right)}{\left(3+\sqrt{6}\right)\left(3-\sqrt{6}\right)}\right]\left(\sqrt{6}+1\right)\)
\(M=\left[\dfrac{15\left(\sqrt{6}-1\right)}{6-1}+\dfrac{4\left(\sqrt{6}+2\right)}{6-4}-\dfrac{12\left(3+\sqrt{6}\right)}{9-6}\right]\left(\sqrt{6}+1\right)\)
\(M=\left[3\left(\sqrt{6}-1\right)+2\left(\sqrt{6}+2\right)-4\left(3+\sqrt{6}\right)\right]\left(\sqrt{6}+1\right)\)
\(M=\left(3\sqrt{6}-3+2\sqrt{6}+4-12-4\sqrt{6}\right)\cdot\left(\sqrt{6}+1\right)\)
\(M=\left(5\sqrt{6}-4\sqrt{6}+1-12\right)\left(\sqrt{6}+1\right)\)
\(M=\left(\sqrt{6}-11\right)\left(\sqrt{6}+1\right)\)
\(M=6+\sqrt{6}-11\sqrt{6}-11\)
\(M=-10\sqrt{6}-5\)
\(\sqrt{17-12\sqrt{2}}+\sqrt{8}=\sqrt{\left(3-2\sqrt{2}\right)^2}+2\sqrt{2}=3-2\sqrt{2}+2\sqrt{2}=3\)
\(\sqrt{7+4\sqrt{21-12\sqrt{3}}}=\sqrt{7+4\sqrt{\left(2\sqrt{3}-3\right)^2}}=\sqrt{7+4\left(2\sqrt{3}-3\right)}\)
\(=\sqrt{8\sqrt{3}-5}\) (câu này đề bài bị nhầm dấu, phải là \(\sqrt{7-4\sqrt{21-12\sqrt{3}}}\) mới hợp lý)
\(\sqrt{\sqrt{5}-\sqrt{3-\sqrt{29-12\sqrt{5}}}}=\sqrt{\sqrt{5}-\sqrt{3-\sqrt{\left(2\sqrt{5}-3\right)^2}}}\)
\(=\sqrt{\sqrt{5}-\sqrt{3-\left(2\sqrt{5}-3\right)}}=\sqrt{\sqrt{5}-\sqrt{6-2\sqrt{5}}}\)
\(=\sqrt{\sqrt{5}-\sqrt{\left(\sqrt{5}-1\right)^2}}=\sqrt{\sqrt{5}-\sqrt{5}+1}=1\)
\(\left(\dfrac{2\sqrt{3}-\sqrt{6}}{\sqrt{8}-2}+1\right)\cdot\dfrac{1}{2+\sqrt{6}}\)
\(=\left(\dfrac{\sqrt{6}\left(\sqrt{2}-1\right)}{2\left(\sqrt{2}-1\right)}+1\right)\cdot\dfrac{1}{\sqrt{6}+2}\)
\(=\dfrac{\sqrt{6}+2}{2}\cdot\dfrac{1}{\sqrt{6}+2}\)
\(=\dfrac{1}{2}\)
\(B=\dfrac{\sqrt{13}\left(\sqrt{2}-1\right)}{\sqrt{13}}-\dfrac{\sqrt{2}+1}{2-1}=\sqrt{2}-1-\sqrt{2}-1=-2\)
\(C=\sqrt{\left(4+\sqrt{7}\right)\left(4-\sqrt{7}\right)}=\sqrt{16-7}=\sqrt{9}=3\)
d
\(\sqrt{18}-\sqrt{6}\left(\sqrt{3}-\sqrt{24}\right)\\ =\sqrt{18}-\sqrt{6.3}+\sqrt{6.24}\\ =\sqrt{18}-\sqrt{18}+\sqrt{144}\\ =0+\sqrt{12^2}\\ =12\)
e
\(\sqrt{12}\left(\sqrt{5}-\sqrt{3}\right)-\sqrt{60}\\ =\sqrt{12.5}-\sqrt{12.3}-\sqrt{60}\\ =\sqrt{60}-\sqrt{60}-\sqrt{36}\\ =0-\sqrt{6^2}\\ =0-6\\ =-6\)