#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 ");
printf("x1=%5.2f ,x2=%5.2f ",(-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 ");
printf("x1=x2=%5.2f ",(-b+sqrt(disc))/(2*a));
}
else printf("方程无解");
return 0;