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# Complex Numbers watch

1. I'm struggling with a FP1 question.
Write down the conjugate of each the complex number.
z^2 = 8i

The answer is -1 + i

I can see how to get the answer. Any help would be greatly appreciated.
2. (Original post by tommy_lees)
I'm struggling with a FP1 question.
Write down the conjugate of each the complex number.
z^2 = 8i

The answer is -1 + i

I can see how to get the answer. Any help would be greatly appreciated.
are you sure that question is right? Because I would usually use the formula there but hmmm.

3. I've attached the question in context of the other ones. It's question 5d.

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