How to Solve Quadratic Equations by the Diagonal Sum Method
How to Solve Quadratic Equations by the Diagonal Sum Method
Recall that a quadratic equation has two roots.
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Recall the Rule Of Sign For Real Roots.
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Assume that the quadratic equation has two real rational roots and express them as fractions in reduced terms with positive denominators.
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Factor both a and c. Compose all pairs of fractions whose numerators multiply to c (r.t = c) and whose denominators multiply to a (s.u = a).
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Check the diagonal sum of each candidate.
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