chapter 4, page 27, exercise set 4.2, Q13

[Zayd-R]

6n + 27 should be 6n^2 + 27

I do not know If you care about these types of mistakes so I will take your feedback on it and ignore any similar mistakes if you do not care about them.

Thank you for your work.

[spamegg1]

Thanks! It does not affect the solution but I definitely care, so keep 'em coming. Fixed here