#include <stdio.h>
#include <math.h>
void command_zero(double a,double b,double c);
void command_upzero(double a,double b,double c);
void command_downzero(double a,double b,double c);
int main()
{
double a,b,c,flag;
scanf("%lf%lf%lf",&a,&b,&c);
flag=pow(b,2)-4*a*c;
if(flag<0)
command_downzero(a,b,c);
else if(flag>0)
command_upzero(a,b,c);
else
command_zero(a,b,c);
return 0;
}
void command_zero(double a,double b,double c)
{
double x;
x=-b/2*a;
printf("x1=%.3lf x2=%.3lf",x,x);
}
void command_upzero(double a,double b,double c)
{
double x1,x2;
x1=(sqrt(pow(b,2)-4*a*c)-b)/(2*a);
x2=(-sqrt(pow(b,2)-4*a*c)-b)/(2*a);
printf("x1=%.3lf x2=%.3lf",x1,x2);
}
void command_downzero(double a,double b,double c)
{
double flag=sqrt(4*a*c-pow(b,2))/(2*a);
printf("x1=%.3lf+%.3lfii x2=%.3lf-%.3lfi",-b/(2*a),flag,-b/(2*a),flag);
}
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