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Mathematics
Mathematics
Problem
Prove that
(
a
+
b
)
3
+
(
a
−
b
)
3
=
2
a
3
+
6
a
b
2
(a+b)^3 + (a-b)^3 = 2a^3 + 6ab^2
(
a
+
b
)
3
+
(
a
−
b
)
3
=
2
a
3
+
6
a
b
2
.
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