a(a + b)^3 - 3a²b(a + b)
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Answer:
The answer is a[ a^3 + b^3]
Step-by-step explanation:
a(a + b)^3 - 3a²b(a + b)
= a[ (a + b)^3 - 3ab(a + b)]
= a[ a^3 + b^3]
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