com.numericalmethod.suanshu.analysis.function.polynomial.root
Class QuarticByFormula

java.lang.Object
  com.numericalmethod.suanshu.analysis.function.polynomial.root.QuarticByFormula

All Implemented Interfaces:

Quartic.QuarticSolver

public class QuarticByFormula
extends java.lang.Object
implements Quartic.QuarticSolver

This solves the quartic equations by a root-finding formula.

Solve

ax⁴ + bx³ + cx² + dx + e = 0

using 4 direct equations for 4 roots.

See Also:

PlanetMath: Quartic Formula

Constructor Summary

QuarticByFormula()

Method Summary

NumberList

solve(double a, double b, double c, double d, double e) Solve ax4 + bx3 + cx2 + dx + e = 0

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

QuarticByFormula

public QuarticByFormula()

Method Detail

solve

public NumberList solve(double a,
                        double b,
                        double c,
                        double d,
                        double e)

Description copied from interface: Quartic.QuarticSolver

Solve

ax⁴ + bx³ + cx² + dx + e = 0

Specified by:

solve in interface Quartic.QuarticSolver

Parameters:

a - a

b - b

c - c

d - d

e - e

Returns:

the list of roots