\(x-\sqrt{4x-3}=2\)
\(\Leftrightarrow\sqrt{4x-3}=x-2\)
\(\Leftrightarrow4x-3=x^2-4x+4\)
\(\Leftrightarrow-x^2+4x+4x-3-4=0\)
\(\Leftrightarrow-x^2+x+7x-7=0\)
\(\Leftrightarrow x\left(1-x\right)-7\left(1-x\right)=0\)
\(\Leftrightarrow\left(1-x\right)\left(x-7\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}1-x=0\\x-7=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=1\\x=7\end{matrix}\right.\)
Thử lại chỉ có x = 7 thỏa mãn