You missed the solutions should give the set of number: The set of numbers should be specified. With (x,y) ∈ ℤxℤ You get: (x , y) ∈ {(-8,-5), (-8,5),(8,-5),(8,5), (-20,-19),(-20,+19),(20,-19),(20,19)} With (x,y) ∈ QxQ, you will get an infinite number of solutions.
Ill-posed problem. General (infinite) solution in the reals: all the points (x,y = ±√(x^2 - 39)) with |x|≥√39 Infinite solutions can also be given in complex numbers
You say solve the "Math Olympiad problem" but then magically make it so that x-y<x+y. So, why not at the beginning of the problem state that we are looking for specific values of x,y? We are just suppose to throw out solutions like (-20,-19), (-8,-5), (-20,19), (20,-19), etc...?
wow. I was not familiar with your working but it agrees with open ai's opinion. open ai says in complex numbers, we can define the logarithm of a negative number. It says -2 = 2 . -1 = 2 . e^( i pi) log(-2) = log(2) + i pi. In fact log(-2) has multiple values as you can add 2 n pi i where n is any integer