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Diophantine Equations
medium
0:00.0
How many positive integer solutions
(
x
,
y
)
(x, y)
(
x
,
y
)
satisfy
x
2
−
y
2
=
15
x^2 - y^2 = 15
x
2
−
y
2
=
15
?
A
2
B
4
C
1
D
3
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