二次方程求解器

/**from 时代Java - N o w  J a v a . c o m**/

public class Main {

  public static void main(String[] arg) {

    double a, b, c;

    a = Math.sqrt(3.0);

    b = 2.0;

    c = -3.0;

    double delta = b * b - 4.0 * a * c;

    double root1, root2;

    root1 = (-b - Math.sqrt(delta)) / (2.0 * a);

    root2 = (-b + Math.sqrt(delta)) / (2.0 * a);

    System.out.println(root1);

    System.out.println(root2);

    System.out.println("Let us check the roots:");

    System.out.println(a * root1 * root1 + b * root1 + c);

    System.out.println(a * root2 * root2 + b * root2 + c);

  }

}