[tex]A = \left\{ x\in \mathbb{Z}\,\big| -\sqrt{5} < x < \sqrt{7}\right\}[/tex]
[tex]\Rightarrow \mathit{-\sqrt{9}} < \mathbf{-\sqrt{5}} < \mathit{-\sqrt{4}} < x < \mathit{\sqrt{4}} < \mathbf{\sqrt{7}} < \mathit{\sqrt{9}}[/tex]
[tex]\Rightarrow \mathit{-3} < \mathbf{-\sqrt{5}} < \mathit{-2} < x < \mathit{2} < \mathbf{\sqrt{7}} < \mathit{3}[/tex]
⇒ A = {-2; -1; 0; 1; 2}
