\[x^{2} = \sqrt{5 - \sqrt{24}} \cdot \sqrt{5 + \sqrt{24}}\]
\[x^{2} = \sqrt{\left( 5 - \sqrt{24} \right)\left( 5 + \sqrt{24} \right)}\]
\[x^{2} = \sqrt{25 - 24}\]
\[x^{2} = \sqrt{1}\]
\[x = \pm 1.\]