book Maths Puzzle Numerical Ability

How do I simplify this problem by dividing?

x^3 + 2x^2 + 3x - 6 / x - 1

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book Other Question

I have to solve each of the following systems of linear inequalities graphically and I cannot figure it out. These are the three inequalities 3x-y is less than/equal to 6, and x is using foil method find the product (-c-d)2
i got -c2+cd-d2 is that correct?