#include <stdio.h>
#include <math.h>

int main (void){
float a, b, c, delta, x1, x2;

    printf ("Introduza o a, o b e o c:\n");
    scanf ("%f %f %f", &a, &b, &c);

    delta = (b*b)-(4*a*c);
    printf ("Delta: %f\n", delta);

    if (delta < 0){
        printf("Impossivel");
    } else {
        x1 = (- b - sqrt (delta))/(2 * a);
        x2 = (- b + sqrt(delta))/(2*a);
        printf("%.2f e %.2f", x1, x2);
    }

return 0;
}