How can I show that there are only finitely many solutions for the following system? x

lilmoore11p8

lilmoore11p8

Answered question

2022-07-16

How can I show that there are only finitely many solutions for the following system?
x 2 + y z = x
y 2 + z x = y
z 2 + x y = z

Answer & Explanation

persstemc1

persstemc1

Beginner2022-07-17Added 18 answers

First assume x = y = z. That will give you two solutions.
Otherwise, one of the three unknowns differs from both others. If we assume x y and x z, use lab bhatteacharjee's hint to obtain two linear equations in x , y , z. You will notice that y = z and x = 1 follows from these and then there is a unique solution of the original equations (plus two others, by symmetry)

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