Ta có \(4\left(x-1\right)^2-x^2=0\)
\(\Leftrightarrow\left(x-2\right)\left(3x-2\right)=0\)
\(\Leftrightarrow\left\{{}\begin{matrix}x-2=0\\3x-2=0\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x=2\\x=\frac{2}{3}\end{matrix}\right.\)
Tự tính trung bình cộng đi.