\(\sqrt{x^2}=\left|-4\right|\)
\(\Rightarrow\left|x\right|=4\)
\(\Rightarrow\orbr{\begin{cases}x=4\\x=-4\end{cases}}\)
\(\sqrt{x^2}=\left|-4\right|\)
\(\Rightarrow\left|x\right|=\left|-4\right|\)
\(\Rightarrow\orbr{\begin{cases}x=4\\x=-4\end{cases}}\)
\(\sqrt{x^2}=\left|-4\right|\)
\(\sqrt{x^2}=4\)
\(\Rightarrow\hept{\begin{cases}x=4\\x=-4\end{cases}}\)
\(\sqrt{x^2}=\left|-4\right|\)
=>\(\left|x\right|=4\)
=>\(\orbr{\begin{cases}x=-4\\x=4\end{cases}}\)