b/c for the poly that is being solved in this case, the length is 3 but the degree is 2:

```
[Dbg]>>> f
Poly(64*_x**2 - 64*_x - 3*sqrt(3) + 6, _x, domain='EX')
[Dbg]>>> f.length()
3
[Dbg]>>> f.degree()
2

```