package ders;
import java.lang.Math;

public class ders{
	
	

public static void main (String[] args) {
	
	equation eq1=new equation(5,4,3);
	System.out.println(eq1.sol());
	 
	 
 }

}

 class equation {
	
	 private int a;
	 private int b;
	 private int c;
	 
	 public equation (int a,int b,int c) {
		 this.a=a;
		 this.b=b;
		 this.c=c;
		 
	 }
	 
	 public double sol() {
		 double delta=0.0d;
		 
		 int i=2;
		 
		 
		delta = Math.pow(i,this.b)- 4*(this.a*this.c);
		
		return delta;
		 
		 
		 
		 
	 }

}