#include<stdio.h>
#include<math.h>
int main()
{
    double a, b, c, dis,x, x1, x2;
    char i;
    scanf_s("%f %f %f", &a, &b, &c);
    dis = b*b-4*a*c;
    if (a == 0)x = --c / b;
    else if (dis >= 0)x1 = -b / 2 * a + sqrt(dis) / 2 * a, x2 = -b / 2 * a - sqrt(dis) / 2 * a;
    else if (dis < 0)dis = -dis, x1 = -b / 2 * a + sqrt(dis) / 2 * a i; , x2 = -b / 2 * a - sqrt(dis) / 2 * a i;
    return 0;
}

#include<stdio.h>
#include<math.h>
int main()
{
    double a, b, c, dis,x, x1, x2;
  
    scanf("%lf %lf %lf", &a, &b, &c);
    dis = b*b-4*a*c;
    if (a == 0)
    {
        x = -c / b;
        printf("the jie of the fangcheng is %lf\n",x);
        return 0;
    }
    if (dis >= 0)
    {
        x1 = -b / (2 * a) + sqrt(dis) / (2 * a);

        x2 = -b / (2 * a) - sqrt(dis) / (2 * a);
        printf("the jie of the fang cheng is x1=%lf\tx2=%lf\n",x1,x2);
        return 0;
    }
    else
    {
        dis = -dis;
        x1 = -b / (2 * a);
        x2 = sqrt(dis) / (2 * a);
        printf("the jie of the fang cheng is x1=%lf+j%lf\tx2=%lf-j%lf\n",x1,x2,x1,x2);
        return 0;
    }
} 

ding