i just want to know if of all the existing polynomial root solving packages, there is one that solves cubic equations with the exact formula (cardano’s method)

# Fast solving of a cubic equation?

i was looking at the source code an there it was, xD

from the code, the cubic solver isn’t called when using the `roots`

function, but the method is here, and thats all i need to know

does it not call? https://github.com/giordano/PolynomialRoots.jl/blob/196154b7ff97e4310509e1e32290cc80aad83d65/src/PolynomialRoots.jl#L655

from the readme:

`roots`

can be used to solve polynomials of any degree,`roots5`

is tailored to (and works only for) polynomials of degree 5.

the call is in `root5`

, not in `roots`

, but anyway, i used that function directly

ah, I see what you mean, the `solve_cubic_eq`

routine is not used unless `roots5`

is called.