Question

the 9th roots of unity ? the 9th roots of unity ? @Mathematics

Answer 1

What about them?

Answer 2

x ^ 9 = 1 right ?

Answer 3

(x^3)^3-1^3 =0
(x^3-1)(x^6+x^3+1)=0
x=-1,-1,-1
??? how do we find them

Answer 4

Sorry I'm not of much assistance, but perhaps this helps?

http://paul-mccarthy.us/Misc/ProvingRelations.htm