Ta có: \(2x\left(x-\frac{1}{7}\right)=0\)
\(\Leftrightarrow\) \(\left[\begin{array}{nghiempt}2x=0\\x-\frac{1}{7}=0\end{array}\right.\) \(\Leftrightarrow\) \(\left[\begin{array}{nghiempt}x=0\\x=\frac{1}{7}\end{array}\right.\)
Vậy \(x=0\) hoặc \(x=\frac{1}{7}\) thì \(2x\left(x-\frac{1}{7}\right)=0\)
\(2x\left(x-\frac{1}{7}\right)=0\)
\(\Rightarrow\begin{cases}2x=0\\x-\frac{1}{7}=0\end{cases}\)\(\Leftrightarrow\begin{cases}x=0\\x=\frac{1}{7}\end{cases}\)
Vậy \(x=0\) hoặc \(x=\frac{1}{7}\)