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frew@mclean.com apcsunit1 > discriminant
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Return the discriminant of the quadratic. The formula is: b^2 - 4ac


discriminant(1, 6, 5) → 16.0
discriminant(1, 6, 9) → 0.0
discriminant(4, -2, 5) → -76.0

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public double discriminant(double a, double b, double c) { }

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