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11. If is a complex cube root of unity, then (A) is a zero of x2 + x + 1. (B) \pm2 are zeros of x4 + x + 1. (C) \pm2 are the only common zeros of x12 1 and x4 + x2 + 1. (D) \pm and \pm2 are the only common zeros of x12 1 and x4 + x2 + 1. |
| Answer» 11. If is a complex cube root of unity, then (A) is a zero of x2 + x + 1. (B) \pm2 are zeros of x4 + x + 1. (C) \pm2 are the only common zeros of x12 1 and x4 + x2 + 1. (D) \pm and \pm2 are the only common zeros of x12 1 and x4 + x2 + 1. | |