Hello from MrBillDoesMath!
Answer:
(5/x) sqrt ( 10/3)
Discussion:
The question is what is the simplified form of
5 sqrt( 10x/ (3x^3)) =>
5 sqrt( (10/3) (x/x^3) ) => ( as x/x^3 = 1/x^2)
5 sqrt( (10/3)( 1/x^2) ) => ( sqrt(1/x^2) = 1\x )
(5/x) sqrt ( 10/3)
Regards,
MrB