If someone could please give me some assistance with this question, it would be very much appreciated

The graph of a cubic function cuts the x axis at (a,0) and touches the x axis when x=b. It has a y intercept of (0,a^3.b^3). Find the equation of the cubic function.

All I can think of how to start would be y= (x+a)(x-b)^2

So any help would be much appreciciated