Question

Helllllppppppppppppppp thank you

Answer 1

√4=2, and √45=√(9*5)=√9 *√5=3√5
so you have 2/(3√5)
Multiply both top and bottom by √5 to eliminate the √ in the denominator:
(2√5)/15 is the final answer. 

Answer 2

I don’t get it because you can’t divide 45\2 or 4