kabutsu12
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Hi

I'm stuck on question 9 http://www.ocr.org.uk/images/60425-q...hematics-1.pdf http://www.ocr.org.uk/images/63943-m...ics-1-june.pdf

Apparently there are 4 answers but I could only find two 5+3i and -5-3i. Does anyone know how you'd come to the other answers?

Many thanks
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TenOfThem
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(Original post by kabutsu12)
Hi

I'm stuck on question 9 http://www.ocr.org.uk/images/60425-q...hematics-1.pdf http://www.ocr.org.uk/images/63943-m...ics-1-june.pdf

Apparently there are 4 answers but I could only find two 5+3i and -5-3i. Does anyone know how you'd come to the other answers?

Many thanks
What working have you done

Surely each root has 2 square roots giving 4 ... though I have not tried
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