1. The problem statement, all variables and given/known data If the graph of y=x^3+ax^2+bx-8 has a point of inflection at (2,0), what is the value of b? the answer is 8. 2. Relevant equations 3. The attempt at a solution y'=3x^2+2ax+b y''=6x+2a Let y''=0=6x+2a then i plugged in 2 for x and got -6=a So y'=3x^2-12x+b... I dont know where to go from here.