1. The problem statement, all variables and given/known data Find the inverse of each of the following functions 2. Relevant equations y= [sqrt] x^2 + 9 3. The attempt at a solution y = [sqrt] x^2 +9 x= [sqrt] y^2 +9 x-3= y I did the sqrt of 9, and sqrted y and its wrong. The answer is apparently y=+/(plusminus) [sqrt]x^2 -9 .. How do you solve this?