Equation solver

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

void solve(double a, double b, double c);
void imprimir(double im);

int main()
{
    double a,b,c;
    scanf("%lf %lf %lf",&a,&b,&c);
    solve(a,b,c);
    printf("TERMINADO\n");
}

void solve(double a, double b, double c){
    double ans=-b/(a*2);       //-b/2a
    double s=(sqrt(b*b-4*a*c)/(a*2));  //sqrt(b^2-4ac)/(2a)
    ans+=s;
    imprimir(ans);
    printf("y ");
    ans-=2*s;
    imprimir(ans);
}

void imprimir(double im){
    printf("Resultado: %.3f, ", im);
}