---
tag: 0VVK64Q4JK
kind: concept
name: Discriminant of a polynomial
msc: ["12E05"]
sources:
  - url: https://en.wikipedia.org/wiki/Discriminant
    locator: lead section
same_as:
  wikidata: Q192487
  wikipedia: Discriminant
---

## Summary

The discriminant of a polynomial is a quantity computed from its coefficients that is zero exactly when the polynomial has a repeated root.
The [[definition of the discriminant|0CCPN09EMJ]] gives the formula in terms of the roots.