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If the cube roots of unity are 1,omega,o...

If the cube roots of unity are `1,omega,omega^2,` then the roots of the equation `(x-1)^3+8=0` are

a. `-1,1+2omega,1+2omega^2`

b. `-1,1-2omega,1-2omega^2`

c. `-1,-1,-1`

d. none of these

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