1. The problem statement, all variables and given/known data lim sqrt(x^2-9) x->3 2. Relevant equations I understand that the radical will evaluate to 0. I am not sure if the answer to the limit is 0, or undefined 3. The attempt at a solution lim sqrt((3)^2-9) = sqrt(9-9) sqrt(0) = 0 x->3 Thanks for your help.