#include<stdio.h>

#include<math.h>

int main()

{

double a,b,c,disc,x1,x2;

scanf("%lf%lf%lf",&a,&b,&c);

disc=b*b-4*a*c;

if(disc>0)

{

printf("方程有俩个不同的实数根\n");

printf("x1=%5.2f\n,x2=%5.2f\n",(-b/(2*a)+sqrt(disc))/(2*a),x2=(-b/(2*a)-sqrt(disc))/(2*a));

}

if(disc==0)

{

printf("有俩个相同的实数根\n");

printf("x1=x2=%5.2f\n",(-b+sqrt(disc))/(2*a));

}

else printf("方程无解");

return 0;