Réponse :
a)
[tex]\frac{40}{\sqrt{8}} = \frac{40 * \sqrt{8}}{\sqrt{8} * \sqrt{8}} = \frac{40 * \sqrt{8}}{8} = 5\sqrt{8}[/tex]
b)
[tex]\frac{42}{\sqrt{6}} = \frac{42 * \sqrt{6}}{\sqrt{6} * \sqrt{6}} = \frac{42 * \sqrt{6}}{6} = 7\sqrt{6}[/tex]
[tex]\frac{35}{\sqrt{7}} = \frac{35 * \sqrt{7}}{\sqrt{7} * \sqrt{7}} = \frac{35 * \sqrt{7}}{7} = 5\sqrt{7}[/tex]
[tex]\frac{300}{\sqrt{10}} = \frac{300 * \sqrt{10}}{\sqrt{10} * \sqrt{10}} = \frac{300 * \sqrt{10}}{10} = 30\sqrt{10}[/tex]
