Expand $(a + b)^{3}$.
A$a^{3} + 3ab + b^{3}$
B$a^{3} - 3a^{2}b + 3ab^{2} - b^{3}$
C$a^{3} + b^{3}$
D$a^{3} + 3a^{2}b + 3ab^{2} + b^{3}$
Answer & Solution
Correct answer: D. $a^{3} + 3a^{2}b + 3ab^{2} + b^{3}$
Pascal row 3: $1, 3, 3, 1$.
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