QuadraticRealRootFinder (OpenGamma Strata)

java.lang.Object
- com.opengamma.strata.math.impl.rootfinding.QuadraticRealRootFinder

All Implemented Interfaces:

Polynomial1DRootFinder<Double>
```
public class QuadraticRealRootFinder
extends Object
implements Polynomial1DRootFinder<Double>
```
Class that calculates the real roots of a quadratic function.
The roots can be found analytically. For a quadratic $ax^2 + bx + c = 0$, the roots are given by: $$ \begin{align*} x_{1, 2} = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \end{align*} $$ If no real roots exist (i.e. $b^2 - 4ac < 0$) then an exception is thrown.

- Constructor Summary
  
  Constructors
  Constructor Description
  
  QuadraticRealRootFinder()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  Double[] getRoots(RealPolynomialFunction1D function)
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - QuadraticRealRootFinder
```
public QuadraticRealRootFinder()
```
- Method Detail
  - getRoots
```
public Double[] getRoots(RealPolynomialFunction1D function)
```
    Specified by:
    
    getRoots in interface Polynomial1DRootFinder<Double>
    
    Parameters:
    
    function - The function, not null
    
    Returns:
    
    The roots of the function
    
    Throws:
    
    IllegalArgumentException - If the function is not a quadratic
    
    MathException - If the roots are not real