1. The problem statement, all variables and given/known data f(x)=x2-1 and f(x)=2x+2 2. Relevant equations 3. The attempt at a solution Points of intersection are -1 and 3. So you integrate using those as upper and lower and plug it in and subtract, right? But I get 0 for each. So nothing to subtract and 0 is not the correct answer.