\(x^2=8x\)
\(\Leftrightarrow x^2-8x=0\)
\(\Leftrightarrow x\left(x-8\right)=0\)
\(\Leftrightarrow\orbr{\begin{cases}x=0\\x=8\end{cases}}\)
Vậy....
\(x^2=8x\)
\(\Leftrightarrow xx=8x\)
\(\Leftrightarrow xx-8x=0\)
\(\Leftrightarrow x\left(x-8\right)=0\)
\(\Leftrightarrow x-8=0\)
\(\Leftrightarrow x=8\)
\(x^2=8x\)
\(\Leftrightarrow x^2-8x=0\)
\(\Leftrightarrow x\left(x-8\right)=0\)
\(\Leftrightarrow\orbr{\begin{cases}x=0\\x-8=0\end{cases}}\Leftrightarrow\orbr{\begin{cases}x=0\\x=8\end{cases}}\)
Vậy x = 0 hoặc x = 8.
