#include <stdio.h>
#include <math.h>
int main() {
float a, b,c;
float temp;
float x1=0,x2=0;
float r1=0,r2=0;
float v1=0,v2=0;
while (scanf("%f %f %f", &a, &b,&c) != EOF)
{
if(a==0.0f)
printf("Not quadratic equation");
else
{
temp=b*b-4*a*c;
if(temp==0)
{
x1=(-b)/(2*a);
x2=x1;
if(x1==(-0.0))
x1=0.00f;
printf("x1=x2=%.2f\n",x1);
}
else if(temp>0)
{
x1=(-b+sqrt(temp))/(2*a);
x2=(-b-sqrt(temp))/(2*a);
printf("x1=%.2f;x2=%.2f\n",x2,x1);
}
else if(temp<0)
{
r1=(-b)/(2*a);
r2=(-b)/(2*a);
v1=-sqrt(-temp)/(2*a);
v2=sqrt(-temp)/(2*a);
printf("x1=%.2f%.2fi;",r1,v1);
printf("x2=%.2f+%.2fi\n",r2,v2);
}
}
}
return 0;
}