1028

#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);

}