1. What was the most difficult part of the reading for you?
Okay... I've now read this section 3 times (all on different parts of the day) and I can honestly say that I struggled through most of it, which is embarrassing because it doesn't seem like it should be too difficult. I guess that most of my confusion is coming from when to do what or whatever. I'm kind of confused by how many solutions you get when (mostly Theorem 2.5.2.3 and really that whole page kind of confused me.) Also, this quadratic residue and quadratic nonresidue malarky didn't make much sense to me.
2. What was the most interesting part of the reading for you?
I thought that the fact that you can still use (sometimes) the quadratic formula was pretty interesting. But... when can I use it? The theorem says when p is an odd prime (so, not 2? Isn't that when we normally use the quadratic formula?). In the second line of page 45, is there a typo? I mean, what's an inverse of Z7? What does that even mean?
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