Intro to java programming, problem 9.10 Algebra Quadratic Equations, the bold is where I am getting my errors

package javaapplication3; import java.util.Scanner;

public class JavaApplication3 {

/** * @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here //Problem 9.10 // UML diagram /******************************************************* * QuadraticEquation * -------------------------------------------------------- * -a: double * * -b: double * * -c: double * * +QuadradticEquation(a: double, b: double, c: double) * * +getA(): double * * +getB(): double * * +getC(): double * * +getDiscriminant(): double * * +getRoot1(): double * * +getRoot2(): double * *******************************************************/

Scanner input = new Scanner(System.in);

System.out.print("Enter a, b, c: "); double a = input.nextDouble(); double b = input.nextDouble(); double c = input.nextDouble();

QuadraticEquation quadraticEquation = new QuadraticEquation(a, b, c);

System.out.print("The equation has "); if (quadraticEquation.getDiscriminant() < 0) System.out.println("no real roots"); else if (quadraticEquation.getDiscriminant() > 0) { System.out.println("two roots " + quadraticEquation.getRoot1() + " and " + quadraticEquation.getRoot2()); } else { System.out.println("one root " + (quadraticEquation.getRoot1() > 0 ? quadraticEquation.getRoot1() : quadraticEquation.getRoot2())); } private double a; private double b; private double c;

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

public double getA() { return a; }

public double getB() { return b; }

public double getC() { return c; }

public double getDiscriminant() { return Math.pow(b, 2) - 4 * a * c; }

public double getRoot1() { return getDiscriminant() < 0 ? 0 : ((-b) + Math.sqrt(Math.pow(b, 2) - 4 * a * c)) / (2 * a); }

public double getRoot2() { return getDiscriminant() < 0 ? 0 : ((-b) - Math.sqrt(Math.pow(b, 2) - 4 * a * c)) / (2 * a); } }