if alpha and beta are the zeros of polynomial then a x2+bx +cfind value of alpha -beta
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α + β = - b/ a
αβ = c/a
(α - β)² = (α+β)² - 4αβ = (b² - 4ac)/ a²
αβ = c/a
(α - β)² = (α+β)² - 4αβ = (b² - 4ac)/ a²
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