1, 1, 2, 3, 5, 8, 13, , ,

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.

X= -5because this is a single step equation so you would just have to divide -16 both sides for x to equal your solution