Python 3 Program To Solve A Quadratic Equation

This post was last Updated on June 8, 2023 by Himanshu Tyagi to reflect the accuracy and up-to-date information on the page.

In this tutorial, you will find the Python 3 program to solve a quadratic equation. To understand this example, you should know basic Python programming concepts such as variables, data types, and operators.  

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Python 3 Program To Solve A Quadratic Equation

Formula to calculate a quadratic equation = ax² + bx + c = 0, where a, b, and c are real numbers and a ≠ 0.

In the Python code below, users will have to enter the values of a, b, and c, and then the program will output the quadratic equation solutions.

Source Code

import cmath # import complex math module
a = float(input("Enter the value of a= "))
b = float(input("Enter the value of b= "))
c = float(input("Enter the value of c= "))
d = (b**2) - (4*a*c) ## calculate the discriminant
sol1 = (-b-cmath.sqrt(d))/(2*a) # Calculating the first solution
sol2 = (-b+cmath.sqrt(d))/(2*a) # Calculating the second solution
print('The solution of your quadratic equation are {0} and {1}'.format(sol1,sol2))

Now, let’s calculate the roots of an equation x²+5x+6 = 0.

Here, a=1, b=5, and c=6.

Run The Program

Output

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