Main Results
Theorem 3.1 is a unique non-negative integer solution for the Diophantine eqution where x,y and z are non-negative integers.
proof.let x,y and z be non-negative integers such that By Lemma 2.3 we have.Note that z is even.we obtain that Moreover.This implies that x is odd.Now,we will divide the number y into two cases.
case y=0.By Lemma 2.2,it follows that x=1 and z=18.
case y>1.note that.Since.we obtain that .This is a contradiction.
Hence.the solution