The roots of the equation 6x^3+17x^2-5x-6=0 is represented by a,b, and c (from least to greatest). Determine an equation whose roots are a+b, a/b, and ab.

I got the roots of the first equation, which are x+3, 2x+1, and 3x-2, but I don't get how to do the second part. I think you list three cubic equations and solve for a,b, and c, but what do you do with d?

Thanks!