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Hanoi Open Mathematics Competition
2007 Hanoi Open Mathematics Competitions
3
HOMC (Vietnam)
HOMC (Vietnam)
Source:
January 25, 2016
algebra
Problem Statement
Find the number of dierent positive integer triples (x; y; z) satsfying the equations x+y-z=1 and
x
2
+
y
2
ā
z
2
=
1
x^2+y^2-z^2=1
x
2
+
y
2
ā
z
2
=
1
.
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