@@ -0,0 +1,555 @@
+package task4_1;%0A%0Apublic class Square %7B%0A%0A%09%09private float a; %0A%09%09private float b;%0A%09%09private float c;%0A%09%09%09%09%0A%09%09Square (float a, float b, float c)%7B%0A%09%09%09this.a=a;%0A%09%09%09this.b=b;%0A%09%09%09this.c=c;%0A%09%09%7D%0A%09float calculate (int x)%7B%0A%09%09 return (float) (this.a*Math.pow(x,2)+this.b*x+this.c);%0A%09%09 %0A%09%7D%0A%09%0A%09void show ( int start, int finish, int step)%7B%0A%09%09for (int i = start; i %3C=finish;  i=i+step)%7B%0A%09%09%09System.out.println(calculate(i));%0A%09%09%7D%0A%09%7D%0A%0A%09 public static void main(String%5B%5D args)%7B%0A%09%09 Square sq = new Square(-1.0f, 2.0f, 3.0f);%0A%09%09 sq.calculate(-5);%0A%09%09 sq.show(1 , 6, 1 );%0A%09 %7D%0A%7D%0A%0A

add Square.java