/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2020, Arnaud Roques
 *
 * Project Info:  http://plantuml.com
 * 
 * If you like this project or if you find it useful, you can support us at:
 * 
 * http://plantuml.com/patreon (only 1$ per month!)
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 * 
 * This file is part of PlantUML.
 *
 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * PlantUML distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
 * License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 *
 * Original Author:  Arnaud Roques
 * 
 *
 */
package net.sourceforge.plantuml.svek.image;

public class QuadraticEquation {

	private final double a;
	private final double b;
	private final double c;

	public QuadraticEquation(double a, double b, double c) {
		this.a = a;
		this.b = b;
		this.c = c;
	}

	public double[] solve() {
		final double delta = b * b - 4 * a * c;
		final double x0 = (-b - Math.sqrt(delta)) / 2 / a;
		final double x1 = (-b + Math.sqrt(delta)) / 2 / a;
		return new double[] { x0, x1 };
	}

	public double getV(double x) {
		return a * x * x + b * x + c;
	}

}
