Answer:
The equivalent radical expression for the exponential expression
is 
Step-by-step explanation:
Consider the provided exponential expression, 
The rule to change the term to a radical is:
![x^{\frac{1}{n}}=\sqrt[n]{x}](https://tex.z-dn.net/?f=x%5E%7B%5Cfrac%7B1%7D%7Bn%7D%7D%3D%5Csqrt%5Bn%5D%7Bx%7D)
Now consider the provided exponential expression,
Replace x with 15 and n with 2 in the above radical rule.
![15^{\frac{1}{2}}=\sqrt[2]{15}](https://tex.z-dn.net/?f=15%5E%7B%5Cfrac%7B1%7D%7B2%7D%7D%3D%5Csqrt%5B2%5D%7B15%7D)
It can be written as:
![\sqrt[2]{15}=\sqrt{15}](https://tex.z-dn.net/?f=%5Csqrt%5B2%5D%7B15%7D%3D%5Csqrt%7B15%7D)
Thus, the equivalent radical expression for the exponential expression
is 