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Mathematics
Problem
The curve
x
2
+
x
y
+
y
2
=
12
x^{2}+xy+y^{2}=12
x
2
+
x
y
+
y
2
=
12
passes through the point
(
3
,
1
)
(3,1)
(
3
,
1
)
. Determine the equation of the normal line at this point in slope–intercept form.
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