Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Awful

I did not read the entire book, but I got a good idea of how it is laid out by reading sections of it. The book spends a lot of time discussing the quadratic equation. The derivation of the equation is in an Appendix at the back of the book. This, I decided, would be a good place to start. What I saw has to be the most non-intuitive possible proof. There is no motive, no explanation for why things are done the way they are. This is a shame because there is a simple intuitive derivation. I came up with the formula when I was 14 after learning how to factor second order equations. No, I am no genius, not by a long shot. Anybody who is sufficiently nerdy could do the same.After this initial disappointment I glanced at other sections of the book. I found nothing that would provide insight for the non-mathematician.