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x^2-2xy+126y^2=2009 - China South East Olympiad 2009
x^2-2xy+126y^2=2009 - China South East Olympiad 2009
Source:
September 18, 2010
number theory proposed
number theory
Problem Statement
Find all pairs (
x
,
y
x,y
x
,
y
) of integers such that
x
2
ā
2
x
y
+
126
y
2
=
2009
x^2-2xy+126y^2=2009
x
2
ā
2
x
y
+
126
y
2
=
2009
.
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