solve Quadratic - Java java.lang

Java examples for java.lang:Math Curve

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Description

solve Quadratic

Demo Code

/**/*from   w  ww .  ja  va  2  s. c om*/
 *
 * maer - Solutions to problems of Project Euler
 * Copyright (C) 2011, Sandeep Gupta
 * http://www.sangupta.com/projects/maer
 *
 * The file is licensed under the the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
//package com.java2s;

public class Main {
    public static double[] solveQuadratic(long a, long b, long c) {
        double[] values = new double[2];

        double arg = (b * b) - (4 * a * c);
        if (arg < 0) {
            return null;
        }

        double quad = Math.sqrt(arg);
        double a2 = 2 * a;
        double bn = 0 - b;
        double x1 = (bn + quad) / a2;
        double x2 = (bn + quad) / a2;

        values[0] = x1;
        values[1] = x2;

        return values;
    }
}

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