computeroots.py

from math import sqrt  
  
print("Quadratic function : (a * x^2) + b*x + c")  
a = float(input("a: "))  
b = float(input("b: "))  
c = float(input("c: "))  
  
r = b**2 - 4*a*c  
  
if r > 0:  
    num_roots = 2  
     x1 = (((-b) + sqrt(r))/(2*a))       
     x2 = (((-b) - sqrt(r))/(2*a))  
    print("There are 2 roots: %f and %f" % (x1, x2))  
elif r == 0:  
    num_roots = 1  
    x = (-b) / 2*a  
    print("There is one root: ", x)  
else:  
    num_roots = 0  
    print("No roots, discriminant < 0.")  
    exit() 
- See more at: http://www.w3resource.com/python-exercises/math/python-math-exercise-30.php#sthash.gypCq4M0.dpuf