a^3 + 3ab (a+b) + b^3 _____?
- (a - b)^3
- (a + b)^3
- (a^3 + b^3)
- (a^3 - b^3)
Explanation
The expression a^3 + 3ab(a+b) + b^3 simplifies to (a + b)^3.
This follows from the expansion of (a + b)^3, which is a^3 + 3a^2b + 3ab^2 + b^3.
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