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Question

If the cube root of unity are 1,ω,ω2, then the roots of the equation (x+1)3+8=0 are


Your Answer
A
Correct Answer
B
Your Answer
C
-1, -1, -1
Your Answer
D
None of the above

Solution

The correct option is C
(x+1)3+8=0x+1=2,2ω,2ω2x=12,12ω,12ω2=3,12ω,12ω2

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