For a cubic ax3+bx2+cx+dax^3 + bx^2 + cx + dax3+bx2+cx+d with zeroes α,β,γ\alpha, \beta, \gammaα,β,γ: α+β+γ=−b/a\alpha+\beta+\gamma = -b/aα+β+γ=−b/a, αβ+βγ+γα=c/a\alpha\beta+\beta\gamma+\gamma\alpha = c/aαβ+βγ+γα=c/a, αβγ=−d/a\alpha\beta\gamma = -d/aαβγ=−d/a. Use these Viète-style identities to construct cubics from their zeroes.