Quadratic Discriminant
The discriminant indicates the real-root structure of a quadratic equation. A positive value gives two distinct real roots; zero gives a repeated root.
Quadratic Discriminant
Algebra · 3 inputs
How to use this calculator
- Enter coefficient a in number.
- Enter coefficient b in number.
- Enter coefficient c in number.
- Select Calculate and keep the output unit with the answer.
Before you use the answer
Choose the reference quantity before interpreting the number. A ratio, a percentage and a percentage-point difference may use the same observations while answering different questions. For recorded data, keep the original values beside the summary so an unexpected result can be traced back to its inputs.
A negative discriminant indicates complex conjugate roots for real coefficients. The leading coefficient must not be zero.
Does it save my inputs?
No calculation history is stored by this website. The calculator works locally in your browser. See the privacy policy for hosting and contact details.
Why might a result be approximate?
Measurement uncertainty, ideal-model assumptions and floating-point rounding can all matter. Displaying more digits does not improve the original measurement.
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