Where do I even start here?

I've tried so many different methods to try to solve this. First I did the obvious and turned them into factors by doing (x+3)\^2 (x-1) then I tried multiplying them to turn them into a full equation with x\^3 + 5x\^2 + 4x - 9 but none of the answers match any of the other potential answers. For context this is a circuit worksheet. I'm so genuinely lost and I dont know how do this at all