The question hinges on your understanding that a square root is equivalent to the exponent one-half:
The other important part of the question relies on your knowledge that when you raise a term that has an exponent in it to another exponent, you muliply the exponents.
So here's how you would solve a similar question to yours:
The last line is in exponent form. Now you try it with your question.
Stephen La Rocque.>