roots of quadratic equation

#include <stdio.h>
#include <math.h>
int main()
{
    double a, b, c, discriminant, root1, root2, realPart, imaginaryPart;
    printf("Enter coefficients a, b and c: ");
    scanf("%f %f %f",&a, &b, &c);
    discriminant = b*b-4*a*c;
    if (discriminant > 0)
    {
        root1 = (-b+sqrt(discriminant))/(2*a);
        root2 = (-b-sqrt(discriminant))/(2*a);
        printf("root1 = %.2lf and root2 = %.2lf",root1 , root2);
    }
    else if (discriminant == 0)
    {
        root1 = root2 = -b/(2*a);
        printf("root1 = root2 = %.2lf;", root1);
    }
    else
    {
        realPart = -b/(2*a);
        imaginaryPart = sqrt(-discriminant)/(2*a);
        printf("root1 = %.2lf+%.2lfi and root2 = %.2f-%.2fi", realPart, imaginaryPart, realPart, imaginaryPart);
    }
    return 0;
}