SOLUTION: what is the sum of the roots of equation x^4 -1=0 a) -2i b) -1 c) 0 d) 4i e) 6i

Algebra ->  Radicals -> SOLUTION: what is the sum of the roots of equation x^4 -1=0 a) -2i b) -1 c) 0 d) 4i e) 6i      Log On


   

Question 625847: what is the sum of the roots of equation x^4 -1=0
a) -2i
b) -1
c) 0
d) 4i
e) 6i
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
1-1+i-i=0
c) 0