#include "library.h"

double solve_quadratic_1(double A, double B, double C)
{ // the formula is A*x*x + B*x + C = 0, solve for x
  return (-B - sqrt(B*B - 4*A*C)) / (2*A); }

double solve_quadratic_2(double A, double B, double C)
{ // the formula is A*x*x + B*x + C = 0, solve for x
  return (-B + sqrt(B*B - 4*A*C)) / (2*A); }

void main()
{ const double x1 = solve_quadratic_1(1, 6, 1);
  print("Axx + Bx + C = ");
  print(1*x1*x1 + 6*x1 + 1);
  new_line();
  const double x2 = solve_quadratic_2(1, 6, 1);
  print("Axx + Bx + C = ");
  print(1*x2*x2 + 6*x2 + 1);
  new_line(); }