Respuesta :

Since both terms are perfect squares, factor using the difference of squares formula,
a
2
−
b
2
=
(
a
+
b
)
(
a
−
b
)
a
2
-
b
2
=
(
a
+
b
)
(
a
-
b
)
where
a
=
n
a
=
n
and
b
=
4
b
=
4
.
3
(
n
+
4
)
(
n
−
4
)

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