Please help me with this problem..........
/**
* Class for representing quadratic functions (degree 2 polynomials).
* Allows numerous natural operations on such functions including
* differentiation, evaluation, approximate integrals, addition of
* two quadratic functions, etc
public class QuadFunc
{
// Your instance variables declared here
/**
* Default Constructor for objects of class QuadFunc.
* Creates a quadratic function y = x^2
*/
public QuadFunc(){
// YOUR CODE HERE
}
/**
* Constructor for objects of class QuadFunc.
* Creates a quadratic function y = ax^2 + bx + c
*/
public QuadFunc(double a, double b, double c){
// YOUR CODE HERE
}
/**
* Evaluates a quadratic function for given x-value
*
* @param x x-value at which to evaluate the function
* @return the value of the function evaluated at x.
*/
public double eval(double x){
// put your code here
return 0; // remove this; it is here just to make sure it compiles
}
/**
Function is multiplied by coeff (this is a mutator function).
E.g., if f(x) = 2x^2 - 3x + 7 and coeff == -1, f(x) becomes
-x^2 + 3x - 7.
*/
public void multByScalar(double coeff) {
