/* My Java program */
import java.util.Scanner;
 
class MyLabC {
    public static void main(String[] args) {
        final double a = 3;
        final double b = 6;
 
        double xi = 2.6;
        double xi1 = 2.8;
        double c = 0.0;
 
        // Або можна вводити xi та xi1 з клавіатури:
        /*
        Scanner in = new Scanner(System.in);
        System.out.print("Enter xi: ");
        xi = in.nextDouble();
        System.out.print("Enter xi+1: ");
        xi1 = in.nextDouble();
        in.close();
        */
 
        c = (Math.pow(xi, 2) + Math.pow(xi1, 2) - a) / (xi + b);
 
        System.out.println("Final result c = " + c);
    }
}

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