Question

Tìm x
\(x-2.\sqrt{x=0}\)

Answer 1

sai đề r bạn

Answer 2

\(x-2\sqrt{x}=0\)

\(\sqrt{x}\left(\sqrt{x}-2\right)=0\)

\(\Rightarrow\orbr{\begin{cases}\sqrt{x}=0\\\sqrt{x}-2=0\end{cases}}\)

\(\Rightarrow\orbr{\begin{cases}\sqrt{x}=0\\\sqrt{x}=2\end{cases}}\)

\(\Rightarrow\orbr{\begin{cases}x=0^2=0\\x=2^2=4\end{cases}}\)

Answer 3

\(x-2\sqrt{x=0}\)

\(\sqrt{x}\left(\sqrt{x}-2\right)=0\)

\(\Rightarrow\left[\frac{\sqrt{x}=0}{\sqrt{x}-2=0}\right]\)

\(\frac{\sqrt{x}=0}{\sqrt{x}=2}\)

\(\frac{x=0^2=0}{x=2^2=4}\)