Python Math: Find the roots of a quadratic function
Python Math: Exercise-30 with Solution
Write a Python program to find the roots of a quadratic function.
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()
Quadratic function : (a * x^2) + b*x + c a: 5 b: 20 c: 10 There are 2 roots: -0.585786 and -3.414214
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