Bascara - c

main(){

    double a,b,c,x1,x2,d;

    scanf("%lf %lf %lf",&a,&b,&c,&d);

    d = pow(b,2) - (4 * a * c );

    if((a==0) || d<0){
        printf("Impossivel calcular\n");
    }
    else{
        x1 = (-b + sqrt(d) ) / (2 * a);
        x2 = (-b - sqrt(d) ) / (2 * a);

        printf("R1 = %.5lf\n",x1);
        printf("R2 = %.5lf\n",x2);
    }

}