Answer: [tex]\frac{7\sqrt{5} }{5}[/tex]
Step-by-step explanation:
All you need do is to rationalize , that is :
[tex]\frac{7}{\sqrt{5} }[/tex] X [tex]\frac{\sqrt{5} }{\sqrt{5} }[/tex]
= [tex]\frac{7\sqrt{5} }{\sqrt{5} . \sqrt{5} }[/tex]
= [tex]\frac{7\sqrt{5} }{5}[/tex]
