Program to find the roots of a quadratic equation in Python

In this python programming guide, we are going to learn,

• program to find the roots of a quadratic equation in python

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Python program to find the roots of a Quadratic Equation

The program to find the roots of a quadratic equation in Python is as follows:

 

# Owner : TutorialsInhand Author : Devjeet Roy

import math

a = int(input("Enter a: "))
b = int(input("Enter b: "))
c = int(input("Enter c: "))

if a == 0:
    print("Enter the coefficients correctly.")
else:
    disc = b * b - 4 * a * c  
    sqrt_val = math.sqrt(abs(disc))  
      
    if disc > 0:  
        print("Real and different roots ")  
        print((-b + sqrt_val)/(2 * a))  
        print((-b - sqrt_val)/(2 * a))  
      
    elif disc == 0:  
        print("Real and same roots")  
        print(-b / (2 * a))  
      
    else: 
        print("Complex Roots exist.")  
        print(- b / (2 * a), " + i", sqrt_val)  
        print(- b / (2 * a), " - i", sqrt_val)

The output of python program to find the roots of a quadratic equation is as follows:

 

PS C:\Users\DEVJEET\Desktop\tutorialsInHand> python code.py
Enter a: 10
Enter b: 22
Enter c: 3
Real and different roots
-0.14606079858305437
-2.053939201416946

Few important tips about this program

1. If b² < 4ac then roots are complex.

2. If b² == 4ac then roots are real and equal.

3. If b² > 4ac then roots are real and different.

 

Given below is snapshot for python program to find the roots of a quadratic equation: