Java 二次方程求解器

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

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public class Main {

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  public static void main(String[] arg) {

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    double a, b, c;

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    a = Math.sqrt(3.0);

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    b = 2.0;

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    c = -3.0;

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

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    double root1, root2;

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

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

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    System.out.println(root1);

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    System.out.println(root2);

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

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