Answer:
(a+b)
3
−(a−b)
⇒a
+3a
2
b+3ab
+b
−(a
−3a
−b
)
−a
b−3ab
⇒6a
b+2b
⇒2b(3a
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Answer:
(a+b)
3
−(a−b)
3
⇒a
3
+3a
2
b+3ab
2
+b
3
−(a
3
−3a
2
b+3ab
2
−b
3
)
⇒a
3
+3a
2
b+3ab
2
+b
3
−a
3
+3a
2
b−3ab
2
+b
3
⇒6a
2
b+2b
3
⇒2b(3a
2
+b
2
)