1. The problem statement, all variables and given/known data find all the numbers x for which |x-1|*|x+1|=0 2. Relevant equations 3. The attempt at a solution |x-1|*|x+1|=0 |x-1|=0 or |x+1|=0 x-1=0 or x+1=0 x=1 or x=-1 but I think there's a flaw some in my attempt solution...or the whole thing is a flaw.. any help will be much appreciated!!! Thanks!