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Problem
Problem
If
x
x
x
and
y
y
y
are positive integers such that
x
y
+
x
+
y
=
71
xy + x + y = 71
x
y
+
x
+
y
=
71
,
x
2
y
+
x
y
2
=
880
x^2y + xy^2 = 880
x
2
y
+
x
y
2
=
880
, then
x
2
+
y
2
x^2 + y^2
x
2
+
y
2
is equal to a. 125 b. 137 c. 146 d. 152
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