How do you divide #(x^3-7x-6) / (x+1) # using polynomial long division?
You could use synthetic division or polynomial long division.
The formatting is hard for me to write on this. However, Khan academy has an excellent and short video on how you could do a problem like this using synthetic division, which is a much easier and more efficient way of doing these kinds of problems. Synthetic Division Tutorial
If you couldn't understand anything
Watch this video about polynomial long division