How do I solve for the square root of 15/x^3?

Answer 1

Really nothing to "solve" here, since there is no equation.
You can rewrite it in several ways, here is one way:

√(15/x^3)
= √15/(x√x)

or you could rationalize it

√(15/x^3)
= √(15/x^3) * √x^3/√x^3
= √15 x√x /x^3
= √(15x)/x^2

other variations are also possible

Answer 2

Or well, it says "simplify the radical expression." I know the answer is √15/x but I don't understand how to get it.

Answer 3

√(15/x^3) , (your question ) is not equal to √15/x

e.g. let x = 2

√(15/x^3) = √(15/8) = 1.3693..
√15/x = √15/2 = 1.93649...

test x = 2 in both of my answers, it works

Answer 4

Oops!! I'm so sorry. I just realized that I wrote the problem wrong. It's actually 15x/x^3

Answer 5

Nevermind, I figured out how to do it.