Question

what does square root x^16 equal?

Answer 1

sqrt(x^16) is x^8.
As you can see, x^8 * x^8 = x*x*x*x*x*x*x*x * x*x*x*x*x*x*x*x which equals x^16
I don't know why Cortesalondra28 deleted my answer to the question and sayid it was wrong..

Answer 2

the square root is of 16 is 4, not 8.

While your statement X*X*X*X*X*X*X*X    *     X*X*X*X*X*X*X*X does equal x^16, that is not what the question is asking.