Relations between roots and coefficients

S1 = α1+α2+...+αn = -a1/a0

S2 = α1α2 + α1α3+... = Σαiαj; i≠j = (-1)² (a2/a0)


Sn = α1α2...αn = (-1)ⁿ(const. term/a0) {constant term = an)