\(\sqrt{15-6\sqrt{6}}+\sqrt{33-12\sqrt{6}}\)
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\(\sqrt{15-6\sqrt{6}}+\sqrt{33-12\sqrt{6}}\)
\(=\sqrt{3^2+2.3\sqrt{6}+\left(\sqrt{6}\right)^2}+\sqrt{3^2-2.3.2\sqrt{6}+\left(2\sqrt{6}\right)^2}\)
\(=\sqrt{\left(3-\sqrt{6}\right)^2}+\sqrt{\left(3-2\sqrt{6}\right) ^2}=3-\sqrt{6}+2\sqrt{6}-3\)
\(=\sqrt{6}\)
\(\sqrt{15-6\sqrt{6}}+\sqrt{33-12\sqrt{6}}\)
\(=\sqrt{\left(3-\sqrt{6}\right)^2}+\sqrt{\left(2\sqrt{6}-3\right)^2}\)
\(=3-\sqrt{6}+2\sqrt{6}-3=\sqrt{6}\)
g: \(=\left|\sqrt{6}-1\right|=\sqrt{6}-1\)
h: \(=\left|2\sqrt{3}-1\right|=2\sqrt{3}-1\)
l: \(=\left|2-\sqrt{3}\right|-2=2-\sqrt{3}-2=-\sqrt{3}\)
j: \(=\left|3-\sqrt{6}\right|+\left|2\sqrt{6}-3\right|\)
\(=3-\sqrt{6}+2\sqrt{6}-3=\sqrt{6}\)
\(\sqrt{15+6\sqrt{6}}-\sqrt{33-12\sqrt{6}}\)
\(\Leftrightarrow\sqrt{\left(3+\sqrt{6}\right)^2}-\sqrt{\left(2\sqrt{6}-3\right)^2}\)
\(\Leftrightarrow3+\sqrt{6}-2\sqrt{6}+3\)
\(\Leftrightarrow6-\sqrt{6}\)
\(\sqrt{9-6\sqrt{6}+6}+\sqrt{9+6\sqrt{6}+6}\\ =\sqrt{\left(3-\sqrt{6}\right)^2}+\sqrt{\left(3+\sqrt{6}\right)^2}=6\)
sửa lại lúc nhìm nhầm
\(\sqrt{\left(3-\sqrt{6}\right)^2}+\sqrt{24-12\sqrt{6}+3}\\ =3-\sqrt{6}+2\sqrt{6}-3=\sqrt{6}\)
tui hướng dẫn thui nha,,,,\(\sqrt{33-12\sqrt{6}}=\sqrt{24-2.2\sqrt{6}.3+9}=\sqrt{\left(2\sqrt{6}-3\right)^2}=2\sqrt{6}-3\)
ấy dễ ko???,,,bạn lm tương tự típ nhá,,,,
\(\sqrt{15-6\sqrt{6}}+\sqrt{33-12\sqrt{6}}\)
\(=\sqrt{9+6-2.3.\sqrt{6}}+\sqrt{9+24-2.3.2\sqrt{6}}\)
\(=\sqrt{\left(3-\sqrt{6}\right)^2}+\sqrt{\left(3-2\sqrt{6}\right)^2}\)
\(=3-\sqrt{6}-3+2\sqrt{6}=\sqrt{6}\)
\(\sqrt{15-6\sqrt{6}}+\sqrt{33-12\sqrt{6}}\)
\(=\sqrt{15-2.3\sqrt{6}}+\sqrt{33-2.6\sqrt{6}}\)
\(=\sqrt{15-2\sqrt{54}}+\sqrt{33-2\sqrt{216}}\)
\(=\sqrt{9-2\sqrt{6}\sqrt{9}+6}+\sqrt{24-2\sqrt{24}\sqrt{9}+\sqrt{9}}\)
\(=3-\sqrt{6}+\sqrt{24}-3\)
\(=\sqrt{24}-\sqrt{6}\)
\(=\sqrt{6}\)