\(x-2\sqrt{x}=0\left(ĐK:x\ge0\right)\)
\(\Leftrightarrow\sqrt{x}\left(\sqrt{x}-2\right)=0\)
\(\Leftrightarrow\left[\begin{array}{nghiempt}\sqrt{x}=0\\\sqrt{x}-2=0\end{array}\right.\)\(\Leftrightarrow\left[\begin{array}{nghiempt}x=0\left(tm\right)\\x=4\left(tm\right)\end{array}\right.\)
Vậy x={0;4}