Điều kiện \(x\ge 0\)
\(8\sqrt{x}=x^2\)
\(\Rightarrow x^2-8\sqrt{x}=0\)
\(\Rightarrow\sqrt{x}\left(x\sqrt{x}-8\right)=0\)
\(\Rightarrow\left[{}\begin{matrix}\sqrt{x}=0\\x\sqrt{x}-8=0\end{matrix}\right.\)
\(\Rightarrow\left[{}\begin{matrix}x=0\\\sqrt{x}^3=8\end{matrix}\right.\)
\(\Rightarrow\left[{}\begin{matrix}x=0\\\sqrt{x}=2\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=0\\x=4\end{matrix}\right.\)
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