Question

\(\left(x-2\right)^2\)=9

Answer 1

\(\left(x-2\right)^2=9\)

=>\(\left[{}\begin{matrix}x-2=3\\x-2=-3\end{matrix}\right.\)

=>\(\left[{}\begin{matrix}x=5\\x=-1\end{matrix}\right.\)

Answer 2

\((x-2)^2= 3^2\) hoặc \((x-2)^2=-3^2\)

x-2=3 hoặc x-2=-3

x=3+2 hoặc x=-3+2

x=5 hoặc x=-1

Vậy x=5 hoặc x=-1