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Divisibility
hard
0:00.0
If
a
2
−
b
2
=
17
a^2 - b^2 = 17
a
2
−
b
2
=
17
for positive integers
a
,
b
a, b
a
,
b
, what is
a
a
a
?
A
1
1
1
B
8
8
8
C
9
9
9
D
17
17
17
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