#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main()
{
  float a=0,b=0,c=0,delta=0;
  printf("entrez 3 entiers:");
  scanf("%f %f %f",&a,&b,&c);
 
  delta=b*b-4*a*c;
  if(delta<0) 
    printf("pas de solutions réelles\n");
  else if(delta==0) 
    printf("solution double: x=%f\n",(-b)/(2*a));
  else 
    printf("les solutions sont x=%f et \
x=%f\n",((-b)+(float)sqrt(delta))/(2*a),((-b)-(float)sqrt(delta))/(2*a));
  return 0;
}