Bonsoir,
a.
[tex]\dfrac{\sqrt{18} }{\sqrt{3} } =\sqrt{\dfrac{18}{3} } =\sqrt{6} \\[/tex]
b.
[tex]\dfrac{6}{\sqrt{2} } =\dfrac{6*\sqrt{2}}{\sqrt{2}*\sqrt{2} } =\dfrac{6*\sqrt{2} }{2} =3*\sqrt{2} \\[/tex]
c.
[tex]\dfrac{10}{\sqrt{5} } =\dfrac{10*\sqrt{5}}{\sqrt{5}*\sqrt{5} } =\dfrac{10*\sqrt{5}}{5 }=2*\sqrt{5}}[/tex]
