Therefore 2√5 + 2√5 = 4√5How can I simplify this square root fraction?

[Mooija]

Hi
I have to simplify this square root fraction:
10/√5 + √20

The answer is 4√5, but I do not get to that answer.
Please help.

 

[Greg]

Hello Mooija and welcome to MHB. :)

√20 = √4√5 = 2√5

10/√5 = 10√5/5 = 2√5