I've been on this website many times before and need help with some maths questions. I wasn't sure who to ask for help, so I just chose an admin.
Well here are two problems I need help with:
1. Given five distinct points A, B, C, P, Q in the plane, no three are collinear. Prove that AB + BC + CA + PQ < AP + AQ + BP + BQ + CP + CQ. 2. (p, q) is the gcd of p and q. Find all positive integers x, y, z such that x+y = (x, y)^2 y+z = (y, z)^2 z+x = (z, x)^2
Thanks! Can you tell me a bit about how the wiki works? I'm not really sure and it's so big I don't really know what to do.