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the discriminant
Chapter 2 - Quadratics (misc from non-GCSE things)
Term | Definition |
---|---|
discriminant definition | A way to tell, based off of the co-efficients of a function, how many unique real roots it has. |
discriminant of a quadratic | b^2 - 4ac |
discriminant < 0 in a quadratic | no real roots |
discriminant = 0 in a quadratic | 1 repeated real root |
discriminant > 0 in a quadratic | 2 unique real roots |