ĐKXĐ: \(x>0\)
\(log_2^2x-log_2x-log_24+2=0\)
\(\Leftrightarrow log_2^2x-log_2x=0\)
\(\Leftrightarrow log_2x\left(log_2x-1\right)=0\)
\(\Rightarrow\left[{}\begin{matrix}log_2x=0\\log_2x=1\end{matrix}\right.\)
\(\Rightarrow\left[{}\begin{matrix}x=1\\x=2\end{matrix}\right.\)