Let $p$ and $q$ be real numbers such that $p \neq 0$, $p^3 \neq q$ and $p^3 \neq -q$. If $\alpha$ and $\beta$ are non-zero complex numbers satisfying $\alpha+\beta=-p$ and $\alpha^3+\beta^3=q$, then a quadratic equation having $\alpha/\beta$ and $\beta/\alpha$ as its roots is