Which equations represent circles that have a diameter of 12 units and a center that lies on the y-axis? Select two options. Can someone just copy and paste this into I ran out of skips

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.