enhancedmath/lib/Algebra/discriminator.js

This package contains some enhanced mathematical operations

import { isNumber } from '../Helpers';
/**
 * Calculates the discriminator of a second degree equation
 * @param {number} a The coefficient of x^2
 * @param {number} b The coefficient of x
 * @param {number} c The constant
 * @returns {number} The discriminator
 */
const discriminator = (a, b, c) => {
    if (!isNumber(a) || !isNumber(b) || !isNumber(c))
        return undefined;
    return Math.pow(b, 2) - 4 * a * c;
};
/**
 * Calculates the intersection points of a second degree equation
 * @param {number} a The coefficient of x^2
 * @param {number} b The coefficient of x
 * @param {number} c The constant
 * @returns {[]} The intersection points
 */
export const intersection_points = (a, b, c) => {
    if (a === 0) {
        return undefined;
    }
    const D = discriminator(a, b, c);
    if (typeof D !== 'undefined') {
        if (D < 0)
            return [];
        if (D === 0) {
            return [-b / (2 * a)];
        }
        return [(-b + Math.sqrt(D)) / (2 * a), (-b - Math.sqrt(D)) / (2 * a)];
    }
};
export default discriminator;