#include
#include
int main()
{
float a, b, c, d, r1, r2;
scanf("%f%f%f", &a, &b, &c);
d = b * b - 4 * a * c;
if (d > 0)
{
r1 = (-b + sqrt(d)) / (2 * a);
r2 = (-b - sqrt(d)) / (2 * a);
printf("解:%f, %f\n", r1, r2);
}
else if (d == 0)
{
r1 = -b / (2 * a);
printf("解:%f\n", r1);
}
else
{
printf("无实数解\n");
}
return 0;
}