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First solution in Clear category for Quadratic Equation Roots by janesh.sivaruban2
from collections.abc import Iterable
from typing import Union
def quadratic_roots(a: int, b: int, c: int) -> Iterable[Union[int, float, str]]:
discriminant = b**2 - 4*a*c
if discriminant < 0:
return ["No real roots"]
sqrt_disc = discriminant ** 0.5
root1 = (-b + sqrt_disc) / (2 * a)
root2 = (-b - sqrt_disc) / (2 * a)
return sorted([root1, root2], reverse=True)
print("Example:")
print(list(quadratic_roots(1, 2, 3))) # Should print ['No real roots']
# Tests
assert list(quadratic_roots(1, -3, 2)) == [2, 1]
assert list(quadratic_roots(1, 0, -1)) == [1, -1]
assert list(quadratic_roots(1, 2, 1)) == [-1, -1]
assert list(quadratic_roots(1, 0, 1)) == ["No real roots"]
assert list(quadratic_roots(1, 4, 4)) == [-2, -2]
assert list(quadratic_roots(1, -5, 6)) == [3, 2]
assert list(quadratic_roots(1, -6, 9)) == [3, 3]
assert list(quadratic_roots(2, 2, 1)) == ["No real roots"]
assert list(quadratic_roots(2, -7, 6)) == [2, 1.5]
assert list(quadratic_roots(2, -3, 1)) == [1, 0.5]
print("The mission is done! Click 'Check Solution' to earn rewards!")
Oct. 17, 2025
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