express 5�ã72 in simplest radical form

Question

I did this:

�ã72=�ã36*�ã2=6�ã2
6*5=30
30�ã2

Is this right?

Answer 1

I guess maybe we are doing:
5 sqrt(72)
5 sqrt(36) sqrt(2)
30 sqrt(2)

Answer 2

Oh, it didn't come out right

The question was express (5)(sqrt)(72) in simplest radical form

I did:
sqrt(72)=sqrt(36)*sqrt(2)=(6)sqrt(2)
6*5=30
(30)sqrt(2)=answer

Am I on the right track?

Answer 3

Yes, that is fine.