>Delian problem is not solved.Segment x8-x12 is 2sqrt2-2 but
>no 2-4^(1/3).
Proof on the site
>https://www.cut-the-knot.org/do_you_know/Delian.shtml
>is apsolutly wrong. Yes, of course.
>I can send my proof if anyone like that.
A proof of what? That the one at the above link is wrong? You can post it here.
>So,Duplication of the Cube with straight edge and compass
>only is impossible.
Yes, no doubt about that. It was shown at the very first link at the page you refer to:
https://www.cut-the-knot.org/arithmetic/cubic.shtml#cube