A polynomial $\displaystyle {P}{\left({x}\right)}$ has degree $\displaystyle {3}$ and leading coefficient $\displaystyle {8}$.
Two of its roots are $\displaystyle {7}{i}$ and $\displaystyle -{8}$.

Find a possible formula for $\displaystyle {P}{\left({x}\right)}$. You do not need to simplify/distribute your answer.