\(\left(x-3\right)^2=25\)
\(\Rightarrow\left[{}\begin{matrix}\left(x-3\right)^2=5^2\\\left(x-3\right)^2=\left(-5\right)^2\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x-3=5\\x-3=-5\end{matrix}\right.\)
\(\Rightarrow\left[{}\begin{matrix}x=5+3\\x=-5+3\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=8\\x=-2\end{matrix}\right.\)
Vậy x=8; x=-2
