[tex]\displaystyle\\
\left|\sqrt{7}- \sqrt{3} \right| = ?\\\\
7 \ \textgreater \ 3\\\\
\Longrightarrow \sqrt{7}\ \textgreater \ \sqrt{3}\\\\
\Longrightarrow \sqrt{7} - \sqrt{3} \ \textgreater \ 0 ~~~~\text{(Diferenta este pozitiva)} \\\\
\text{Stim ca modul dintr-un numar pozitiv este chiar numarul.}\\\\
|x| = x~~ \text{daca} ~~x \ \textgreater \ 0\\\\
\Longrightarrow \left|\sqrt{7}- \sqrt{3} \right| = {\bf \sqrt{7}- \sqrt{3}}
[/tex]
