Forma Resolv. - <Old>

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

double a, b, c;
float xp, xn, z;

int main()
{
    printf("                                                          Leandro Soares");

    printf("\n a? : "); // inserir o a
    scanf("%lf", &a);

    printf(" b? : "); // inserir o b
    scanf("%lf", &b);

    printf(" c? : "); // inserir o c
    scanf("%lf", &c);

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

    if(z < 0)
    {
        printf("\n\n Raizes nao reais \n\n");
        return 0;
    }


    xp = ( -b + sqrt( z ) ) / 2 * a;

    xn = ( -b - sqrt( z ) ) / 2 * a;


    printf(" x = %f e %f\n\n", xp, xn); // output x positivo e x negativo

    return 0;
}