Question 66095
here we distribute<br>

(n + 1)(n^2 - 7n - 9)
=n(n^2)-n(7n)-n(9)+n^2-7n-9
=n^3-7n^2-9n+n^2-7n-9
=n^3-7n^2+n^2-9n-7n-9
=n^3-6n^2-16n-9