Question

\(\left(x-3\right)^2=25\)

Answer 1

=>(x-3)²=25=5²=(-5)²

=>\(\left[{}\begin{matrix}x-3=5\\x-3=-5\end{matrix}\right.\\ \left[{}\begin{matrix}x=8\\x=-2\end{matrix}\right.\)

Answer 2

\(\Rightarrow\sqrt{\left(x-3\right)^2}=5^2\)

\(\Rightarrow\left|x-3\right|=5\)

\(\Rightarrow x-3=5\)          hoặc   \(x-3=-5\)

\(\Rightarrow x=8\)                           \(\Rightarrow x=-2\)

Answer 3

Answer 4

<=>x-3=5 hoặc x-3=-5

<=>x=8 hoặc x=-2

Answer 5

Ta có: \(\left(x-3\right)^2=25\)

\(\Leftrightarrow\left[{}\begin{matrix}x-3=5\\x-3=-5\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=8\\x=-2\end{matrix}\right.\)