You can
put this solution on YOUR website!Hello
I don't know what a or x is so these expressions can not be simplified completely
The square of three is 3*3 = 9
The sixth root of x to the fifth power is

so the first answer is
For the second one
the cube of 2 is 2*2*2 = 8
The square root of a*x to the fifth is

or

and which form is preferable depends on the context.
Probably you can give
I don't have a copy of your textbook so I will leave it to you to figure out if this is what is needed for your answer.