Are you multi-dimensional too?

[spiny urchin]

Here is another attempt at the solution for a 7th degree polynomial.

http://www.stonetabernacle.com/7th-degree-root.html

If all terms sum to zero, then the sum of partial groups of terms can each
sum to zero as well. If they all require the same solution, then their
nested powers may result in a solution.

[Imaginary One]

"Are you multi-dimensional too?"

That multi-dimensional crap is for wusses.

I'm purely imaginary.

sqrt(-1)