Formula verified · Deterministic calculation

Quadratic Formula Calculator

Solve ax² + bx + c = 0 with the quadratic formula, including real or complex roots and deterministic intermediate steps.

Roots3, 2
Discriminant
1
Vertex x
2.5
Vertex y
-0.25

Trend

1.50.75
2.5-0.25
3.50.75
4.53.75
5.58.75
6.515.75
Methodology

The certified engine computes the discriminant, roots and vertex. The plotted sample points are evaluated from the same validated coefficients.

Sources
  • CalcuMint deterministic algebra engine
Solution steps
  1. D = b² - 4ac = 1
  2. Use stable q = -½(b + sign(b)√D)
  3. x₁ = 3, x₂ = 2

How this calculator works

Compute D = b² - 4ac, then evaluate x = (-b ± √D)/(2a). Negative discriminants are represented as complex conjugate roots.

Formula

x = (-b ± √(b² - 4ac)) / (2a)

Uses the discriminant to determine and calculate the two roots of ax² + bx + c = 0.

Worked example

x² - 5x + 6 = 0 is a verified test case used by the calculation engine.

Assumptions and limitations

  • Coefficient a must be non-zero.
  • Inputs are finite real numbers.

Methodology & sources

This calculator uses deterministic, versioned calculation logic. The formula and verified examples above are part of the calculation definition used by CalcuMint. Technical calculation version: 1.

  • CalcuMint deterministic algebra engine — Standard quadratic formula and vertex identities.

Frequently asked questions

Does it support complex roots?

Yes. A negative discriminant is returned as a pair of complex conjugate roots.

Does it calculate the vertex?

Yes. The deterministic output includes the vertex coordinates.

Related calculators

Quadratic Formula Calculator | CalcuMint