Bài 1:
\(a,=20\sqrt{3}-12\sqrt{3}-10\sqrt{3}+6\sqrt{3}=4\sqrt{3}\\ b,=\left(4\sqrt{5}-4\sqrt{5}+\sqrt{5}\right):\sqrt{5}=\sqrt{5}:\sqrt{5}=1\\ c,=\left|\sqrt{3}-2\right|+\left|\sqrt{3}-1\right|=2-\sqrt{3}+\sqrt{3}-1=1\)
Bài 2:
\(a,\Leftrightarrow3x-1=4\Leftrightarrow x=\dfrac{5}{3}\\ b,ĐK:x\ge\dfrac{1}{2}\\ PT\Leftrightarrow2\sqrt{2x-1}-5\sqrt{2x-1}+6\sqrt{2x-1}=9\\ \Leftrightarrow3\sqrt{2x-1}=9\\ \Leftrightarrow\sqrt{2x-1}=3\\ \Leftrightarrow2x-1=9\\ \Leftrightarrow x=5\left(tm\right)\\ c,\Leftrightarrow\left|x-2\right|=3x-1\\ \Leftrightarrow\left[{}\begin{matrix}x-2=3x-1\left(x\ge2\right)\\x-2=1-3x\left(x< 2\right)\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=-\dfrac{1}{2}\left(ktm\right)\\x=\dfrac{3}{4}\left(tm\right)\end{matrix}\right.\Leftrightarrow x=\dfrac{3}{4}\)
