Python Program to Solve Quadratic Equation

Learn about Python Program to Solve Quadratic Equation in the below code example. Also refer the comments in the code snippet to get a detailed view about what’s actually happening.

Contents

Python Program to Solve Quadratic Equation

A quadratic equation is a second-degree equation, which means it contains at least one squared element. The quadratic equation has the conventional form ax2 + bx + c = 0, where a, b, and c are real and a!=0, and x is an unknown variable. The discriminant determines the nature of the roots.

While declaring the variables, we will take three numbers. Using the math module and an if-else statement, a Python program is used to find the roots of a quadratic equation.

Source code:

# Python program to find roots of quadratic equation

#importing math module
import math  

# inputs from user
a = int(input('Enter the value of a: '))
b = int(input('Enter the value of b: '))
c = int(input('Enter the value of c: '))

# calculate discriminant
dis = (b**2) - (4*a*c)

# check condition for discriminant
if(dis > 0):
    root1 = (-b + math.sqrt(dis) / (2 * a))
    root2 = (-b - math.sqrt(dis) / (2 * a))
    print("Two distinct real roots are %.2f and %.2f" %(root1, root2))

elif(dis == 0):
    root1 = root2 = -b / (2 * a)
    print("Two equal and real roots are %.2f and %.2f" %(root1, root2))

elif(dis < 0):
    root1 = root2 = -b / (2 * a)
    imaginary = math.sqrt(-dis) / (2 * a)
    print("Two distinct complex roots are %.2f+%.2f and %.2f-%.2f" 
                          %(root1, imaginary, root2, imaginary))

Output:

Enter the value of a: 1
Enter the value of b: 5
Enter the value of c: 6
Two distinct real roots are -4.50 and -5.50

Hope above code works for you and Refer the below Related Codes to gain more insights. Happy coding and come back again.