HELP PLZ T^T

The first one is (5,-6)
The second one is (-5,6)
The 3rd one is the answer with all negatives and 4 coordinates
the 4th one is the answer that has 4 coordinates and some positive and some negative

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.