i am terrible at factoring and i would like some much needed help with these!
a) 36(2x - y)^2 - 25(u - 2y)^2
b) x^2 - y^2 + z^2 - 2xz
c) x^2 + 2 + 1/x^2
d) p^2 - 2p + 1 - y^2 - 2yz - z^2
If this were you would have no trouble factoring it (I presume).
Then your expression becomes:
This is a useful little trick to remember. You'll see this kind of factoring every now and again.
Nothing more you can do here.
What I get frustrated about is when I keep making mistakes over and over and over... That means I'm simply working too fast and that doesn't really help the people who have asked for it.
(Not to mention I have nearly as god-like an ego as ThePerfectHacker. Don't tell him that, though, because he might feel that there isn't enough Hilbert space here for the two of us! )