Probably

Also, to the OP, you realize that some of your problems are multiplication.

I'm not going to attempt to even solve one, because I have no idea how to do it in LaTex. I'll just give a couple of hints. When you divide by (x - k), the k goes in the "box." And don't forget to put zeros for any "missing" terms. So for #7, for example, the set up would be

Code:

-1| 1 -7 0 8
--
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... because $\displaystyle (x + 1) = [x - (-1)]$, and there was no x-term in $\displaystyle x^3 - 7x^2 + 8$. Now you try.