CODEWITHSUNDEEP
pythonmathalgebra
user11791503
user11791503

Reputation:

How to write (+/-) in Python?

I'm new to Python and I have below this formula and I faced (+/-) before the square root. How could I write it in Python?

Factorization Formula

Upvotes: 1

Views: 317

Answers (2)

Óscar López
Óscar López

Reputation: 236124

One way or another, you'll have to build two expressions, one with the plus sign and the other with the minus sign. This is the most straightforward way:

from math import sqrt

x1 = (-b + sqrt(b*b - 4*a*c)) / 2.0
x2 = (-b - sqrt(b*b - 4*a*c)) / 2.0

Of course you should calculate the value of b*b - 4*a*c only once and store it in a variable, and check if it's negative before proceeding (to avoid an error when trying to take the square root of a negative number), but those details are left as an exercise for the reader.

Upvotes: 4

Aykhan Hagverdili
Aykhan Hagverdili

Reputation: 29985

This is essentially two formulas represented in one. There is no way to do that in Python. Just use two separate formulas. One with plus one with minus.

Upvotes: 2

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