I was given this equation. $x^3 + 3px^2 + qx + r=0$. The roots are $1, -1$, and $3$.
Ive tried dividing the equation by $(x-1)$ to get a quadratic to make it easier for me. But that ended up really badly.
I also inputted the different roots into the equation to get different equations that I could solve. When I tried to prove my answer it turned out to be a flop.
And I also tried multiplying the three factors and comparing coefficients. It didnt seem right.