Find the roots of a quadratic functionΒΆ
Find the roots of a quadratic function.
Expected output:
Quadratic function : (a * x^2) + b*x + c
a: 25
b: 64
c: 36
There are 2 roots: -0.834579 and -1.725421
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()
Output:
Quadratic function : (a * x^2) + b*x + c
a: 5
b: 20
c: 10
There are 2 roots: -0.585786 and -3.414214