Question

Tìm x biết :
\(\sqrt{x^2}=3\)

Answer 1

\(\sqrt{x^2}=3\)

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

\(\Rightarrow\orbr{\begin{cases}x=3\\x=-3\end{cases}}\)

                                                  Vậy x = 3, x = -3

Answer 2

\(\sqrt{x^2}=3\)

=>\(x=3\)

Answer 3

\(\sqrt{x^2}=3\)

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

\(\Rightarrow\orbr{\begin{cases}x=3\\x=-3\end{cases}}\)

Answer 4

\(\sqrt{x^2}=3\)

\(\Rightarrow x=3\)