hey

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

int main(void)
{
double a, b, c;
double r1, r2;
printf("Input coefficient 1:");
scanf("%lf, &a");
printf("Input coefficient 2:");
scanf("%lf, &b");
printf("Input coefficient 3:");
scanf("%lf, &c");
if((pow(b, 2) - 4*a*c) <= 0){
        printf("Error");
}else {
  double v1 = sqrt(pow(b, 2) - 4*a*c);
          r1 = (v1-b)/(2*a);
          r2 = (-v1-b)/(2*a);
          printf("Root1: %lf \n", r1);
          printf("Root2: %lf \n", r2);