Milan Lukic wrote:
>
> I don't expect that the following reference is what you are looking
> for, but nevertheless, you might enjoy taking a look at how Euler did
> it. See "Euler, The Master of Us All", by William Dunham.
> Euler reduces A*y^4+B*y^3+C*y^2+D*y+E=0 to x^4+a*x^2+b*x+c=0 (page
> 104). He then shows how to factor the later into
> (x^2+u*x+v)*(x^2-u*x+w), pages 111-115.
That works very nicely.
Thanks!
Ray