Bonjour Aminataarabt
[tex]1)\ 0\le x^2\le3\Longleftrightarrow -\sqrt{3}\le x\le\sqrt{3}\\\\ 2)\ 2\le x^2\le9\Longleftrightarrow (-3\le x\le-\sqrt{2}\ \ ou\ \ \sqrt{2}\le x\le3)[/tex]
[tex]3)\ x^2\le25\Longleftrightarrow -5\le x\le5\\\\ 4)\ 4\ \textless \ x^2\ \textless \ 16\Longleftrightarrow (-4\ \textless \ x\ \textless \ -2\ \ ou\ \ 2\ \textless \ x\ \textless \ 4)[/tex]
