1. The problem statement, all variables and given/known data http://www.math.poly.edu/courses/ma0914/past_exams/MA0922_Final_2000-12-13.pdf [Broken] First problem on the exam 2. Relevant equations I believe the answer should be a 3rd degree polynomial so Ax^3+Bx^2+Cx+D 3. The attempt at a solution Ax^3+Cx -8A-2C=0 8A+2C=0 -A-C=3 -4A=C -A+4A=3A A=1. However that is impossible because A has to be negative for the 2nd derivative on the left side of the equation to be positive. Idk where I went wrong.