Question

(x-7)^2=36

Answer 1

=>x-7=6 hoặc x-7=-6

=>x=13 hoặc x=1

Answer 2

\(\left(x-7\right)^2=36\\\left[{}\begin{matrix}\left(x-7\right)^2=6^2\\\left(x-7\right)^2=\left(-6\right)^2\end{matrix}\right.=>\left[{}\begin{matrix}x-7=6\\x-7=-6\end{matrix}\right.=>\left[{}\begin{matrix}x=13\\x=1\end{matrix}\right.\)