C1 - Where did I go wrong? Help please? Watch

elishx__h
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I was attempting this question but I'm not sure where I went wrong:


(This is for quadratic inequalities btw).

This is my working out:

But the Edexcel textbook states the answer as -8<p<0, I'm not sure how you get to that solution? Maybe I made a small error somewhere but I can't see it.

Please advise, thanks.
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TenOfThem
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(Original post by elishx__h)

Please advise, thanks.
The book is wrong
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elishx__h
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(Original post by TenOfThem)
The book is wrong
Thanks for letting me know
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