In this post, we will learn how to solve a quadratic equation using Python Programming language.
This program asks the user to enter the values of a, b and c, then it computes the roots of the quadratic equation using cmath.
So, without further ado, let’s begin this tutorial.
Python Program to Solve Quadratic Equation
# Python Program to Solve Quadratic Equation
import cmath
# Asking for input
a = int(input("Enter the value of a: "))
b = int(input("Enter the value of b: "))
c = int(input("Enter the value of c: "))
# Calculating discriminant
d = (b**2) - (4*a*c)
# finding roots
root1 = (-b-cmath.sqrt(d)) / (2 * a)
root2 = (-b+cmath.sqrt(d)) / (2 * a)
print("The Roots are {0} and {1}" .format(root1, root2))
Output
Enter the value of a: 2
Enter the value of b: 1
Enter the value of c: -6
The Roots are (-2+0j) and (1.5+0j)
How Does This Program Work ?
import cmath
We import the cmath module in our program in order to perform complex square root.
# Asking for input
a = int(input("Enter the value of a: "))
b = int(input("Enter the value of b: "))
c = int(input("Enter the value of c: "))
The user is asked to enter the values of a, b and c.
# Calculating discriminant d = (b**2) - (4*a*c)
Then, we calculate the discriminant using the formula b2 – 4ac.
# finding roots root1 = (-b-cmath.sqrt(d)) / (2 * a) root2 = (-b+cmath.sqrt(d)) / (2 * a)
Now, we calculated the square roots using the formula [(-b + (4ac)½ ) / 2a] and [(-b – (4ac)½) / 2a].
print("The Roots are {0} and {1}" .format(root1, root2))
Finally, the result is displayed on the screen using print() function.
Conclusion
I hope after going through this post, you understand how to solve a quadratic equation using Python Programming language.
If you have any doubt regarding the program, feel free to contact us in the comment section. We will be delighted to help you.
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