Two square roots of unity are

1, - 1

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- 1, ω

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1, - ω

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None of these

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Solution

The correct option is A $1, - 1$
Square roots of unity are $(1, - 1)$ which can be determined as follows:

Let $x$ be a number whose square is $1$
i.e $x^{2} = 1$
$\Rightarrow x = - 1, 1$ are the only solution of the equation $x^{2} = 1$

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