Some help would be extremely appreciated.

" Show the two synthetic division "lines" for the integral values on either side of the upper real zero of f(x)=x

^{3}-9x

^{2}-x-5 "

I have tried dividing the equation synthetically by using the possible rational roots: +1,-1,+5, and -5 and each of these give me a remainder, I am so lost currently and would really appreciate some help

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Lorynn