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  1. import static java.lang.Math.*;
  2.  
  3. public class Polynomial {
  4.  
  5.     private double a1, b1, c1;
  6.     private double a2, b2, c2;
  7.  
  8.     private Polynomial(double a1, double b1, double c1) {
  9.         this.a1 = a1;
  10.         this.b1 = b1;
  11.         this.c1 = c1;
  12.     }
  13.  
  14.     /*private Polynom2(double a2, double b2, double c2) {
  15.         this.a2 = a2;
  16.         this.b2 = b2;
  17.         this.c2 = c2;
  18.     }*/
  19.  
  20.     private void addPolynom() {
  21.         double a3 = a1 + a2;
  22.         double b3 = b1 + b2;
  23.         double c3 = c1 + c2;
  24.  
  25.     }
  26.  
  27.  
  28.     private void subPolynom() {
  29.         double a3 = a1 - a2;
  30.         double b3 = b1 - b2;
  31.         double c3 = c1 - c2;
  32.     }
  33.  
  34.     private void nullPolynom(){
  35.         double d = 4 * b1 - a1 * c1;
  36.         double x1 = ((-b1 + sqrt(d)) / 2) * a1;
  37.         double x0 = ((-b1 - sqrt(d)) / 2) * a1;
  38.         System.out.print("x0= "+x0+ "   x1="+x1);
  39.  
  40.     }
  41.     public String toString(){
  42.         return "f(x1)= " + a1 +"x^2 + "+ b1 +"x + "+ c1;
  43.     }
  44.     public static void main(String[] args) {
  45.         Polynomial polynom = new Polynomial(2.0, -5.0,  9.0);
  46.         Polynomial polynom1 = new Polynomial( -5.0, 8.0, -3.0);
  47.         System.out.println("f(x)=" +polynom.a1+"x^2  "+polynom.b1+"x + "+polynom.c1);
  48.         System.out.print(polynom);
  49.         polynom.addPolynom();
  50.         System.out.println(polynom);
  51.         polynom.subPolynom();
  52.         System.out.println(polynom);
  53.         polynom.nullPolynom();
  54.     }
  55. }
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