Subjects/Algebra/Polynomials/Vieta's formulas11. PolynomialsVieta's formulasLevel: intermediateIn 11. PolynomialsFormulaCopy LaTeXr1+r2=−ab;r1r2=acDetailRelates the roots and coefficients of a quadratic.Related formulasRelatedQuadratic formulax=2a−b±b2−4acOpen formulaOpen in sectionRelatedQuadratic via rootsax2+bx+c=a(x−r1)(x−r2)Open formulaOpen in section