Please help me with this

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a.p.

In order for the function to be linear, what must m be and why? m = 22 because the rate of change is 1. m = 20 because the rate of change is 3. m = 22 because the rate of change is -1. m = 20 because the rate of change is -3.

Have yall ever just farted and was like, i farted.