polynomial 1.0.0

Simple API to perform polynomial operations like finding roots, addition, subtraction, multiplication, division, etc.

Polynomial

Simple API to perform polynomial operations like finding roots, addition, subtraction, multiplication, division, etc.

Usage

Constructor

import 'package:polynomial/polynomial.dart';

void main() {
    var poly = Polynomial([1, 2, 3]);
    print(poly.evaluate(5)); // => 86
    print(poly(5)); // => 86
}

import 'package:polynomial/polynomial.dart';

void main() {
  var poly = x.pow(3) * 4 + x * x * 2 - 5;
  print(poly.evaluate(5)); // => 545
}

Operations

import 'package:polynomial/polynomial.dart';

void main() {
  var poly = Polynomial([1, 4]);
  print(poly); // => 4x + 1
  poly = poly * Polynomial([3, 2]);
  print(poly); // => 8x² + 14x + 3
  poly = poly / Polynomial([1, 4]);
  print(poly); // => 2x + 3
  poly = poly - Polynomial([1, 1]);
  print(poly); // => x + 2
}

Derivative and Integral

import 'package:polynomial/polynomial.dart';

void main() {
  var poly = Polynomial([1, 2, 3]);
  print(poly); // => 3x² + 2x + 1
  var d = poly.derivative();
  print(d); // => 6x + 2
  var i = d.integral();
  print(i); // => 3x² + 2x
}

Solve/Roots

import 'package:polynomial/polynomial.dart';

void main() {
  var poly = (x - 1) * (x - 2);
  print(poly); // => x² - 3x + 2
  var roots = poly.solveAll();
  print(roots); // => (x - 1) * (x - 2)
  poly = poly * Polynomial([-3, 1]);
  print(poly); // => x³ - 6x² + 11x - 6
  roots = poly.solveAll();
  print(roots); // => (x - 1) * (x - 2) * (x - 3)
}

TODO

• Discriminant