1. find the equation of the curve which passes through the points (1,3), (2,9) and whose gradient is directly proportional to x((2x^2)-3)

the second question is;

2. given that the gradient of a curve is (ax-3) and the curve passes through the points (-1,8 ) , (3,4), find the equation of the curve.

thank you for your patience, and would appreciate any of your help