// A program to calculate two roots of a quadratic equation
// Assume that a<>0 and that b^2 >= 4ac is true

import java.util.*;

public class Workspace {
	public static void main(String[] args) {
		// declaration of variables
		double a, b, c, root1, root2, sqrtDiscr;
		Scanner scanner;
		scanner = new Scanner(System.in);

		// input a, b and c
		System.out.print("Enter a (may not be 0): ");
		a = scanner.nextDouble();
		System.out.print("Enter b: ");
		b = scanner.nextDouble();
		System.out.print("Enter c: ");
		c = scanner.nextDouble();

		// compute the two roots
		sqrtDiscr = Math.sqrt(Math.pow(b,2) - 4 * a * c);
		root1 = (-b + sqrtDiscr) / (2 * a);
		root2 = (-b - sqrtDiscr) / (2 * a);

		// output the two roots
		System.out.println();
		System.out.println("Two roots of the equation, " + a + "*x*x + " + b + "*x + " + c + " = 0, are:");
		System.out.printf("%.2f and %.2f.", root1, root2);
	}
}