A quadratic equation is represented as
ax2 + bx + c = 0. The general formula to find its roots (x-values for which y = 0) is:
This formula provides two roots:
x1, x2. The value inside the square root,
b2-4ac is known as the discriminant (
D). Based on the value of the discriminant, a quadratic equation can have:
- two distinct real roots (
D > 0);
- one real root (
D = 0);
- no real roots (
D < 0).
Your code must return Iterable containing two values: the roots
x1, x2, sorted descending. If there's only one real root, both values will be the same. If there are no real roots, the Iterable should contain the string
"No real roots".
Input: Three integers (int).
Output: Tuple or other Iterable of two integers (int) or string (str).
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"]
How it’s used: this function can be useful in mathematical computations, physics simulations, optimization problems, or anywhere quadratic equations are utilized.
- a != 0;
- -109 <= a, b, c <= 109.
CheckiO Extensions allow you to use local files to solve missions. More info in a blog post.
In order to install CheckiO client you'll need installed Python (version at least 3.8)
Install CheckiO Client first:
pip3 install checkio_client
Configure your tool
checkio --domain=py config --key=
Sync solutions into your local folder
(in beta testing) Launch local server so your browser can use it and sync solution between local file end extension on the fly. (doesn't work for safari)
checkio serv -d
Alternatevly, you can install Chrome extension or FF addon
checkio install-plugin --ff
checkio install-plugin --chromium