# CubicRealPolynomial

#### CubicRealPolynomial()
Core/CubicRealPolynomial.js 15

  Defines functions for 3rd order polynomial functions of one variable with only real coefficients.

### Methods

#### staticCesium.CubicRealPolynomial.computeDiscriminant(a, b, c, d) → Number
Core/CubicRealPolynomial.js 26

  Provides the discriminant of the cubic equation from the supplied coefficients.

  Name | Type | Description
  --- | --- | ---
  `a` | Number | The coefficient of the 3rd order monomial.
  `b` | Number | The coefficient of the 2nd order monomial.
  `c` | Number | The coefficient of the 1st order monomial.
  `d` | Number | The coefficient of the 0th order monomial.

  ##### Returns:

  The value of the discriminant.

#### staticCesium.CubicRealPolynomial.computeRealRoots(a, b, c, d) → Array.<Number>
Core/CubicRealPolynomial.js 165

  Provides the real valued roots of the cubic polynomial with the provided coefficients.

  Name | Type | Description
  --- | --- | ---
  `a` | Number | The coefficient of the 3rd order monomial.
  `b` | Number | The coefficient of the 2nd order monomial.
  `c` | Number | The coefficient of the 1st order monomial.
  `d` | Number | The coefficient of the 0th order monomial.

  ##### Returns:

  The real valued roots.