Duplicate.

Imarked this issue as solved. Thank you Giacomo.

Fixed the description, what about now?

Actually it would be better to use .sort((a, b) => +a - +b), but my mistake, I will see to fix it.

For the Javascript version message @GiacomoSorbi.

by default Array.sort() converts array elements to strings then sorts alpha-numerically
if you supply it with a function it will use that function to do the sort instead

to sort Numerically from smallest to largest use
.sort((a, b) => a-b)

If you replace .sort() in the test cases with .sort((a, b) => a-b) then the test cases will expect numerically sorted results

In javascript at least the order is based on a string sort. This seems very unintuitive for a math based problem. with a string based sort some times the smaller number is first other times the larger number is first

ex.
24.01 is before 3.01
but 3.01 is before 4.01

Since for a math based problem I would normally expect to sort results numerically, I think you should explicitly state that results are sorted by their string reresentation or change it to sort numerically

It's given in the details. It's easy to deduce it,

sec_deg_solver(a, b, c) == Two solutions: -0.7403124237, 0.5403124237

The fourth test case checks "scriptjavx" and "javascript".
But in general you can just print the arguments in the function to see what arguments your function fails on.