i would appreciate if you can help me with this u will get a good amount of points and if u do not awnser and u just say hi or some , u will get reported!

What do you mean by that?

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.