Expand $(1 + x)^{3}$.
A$1 + 3x^{3}$
B$3x + 3x^{2}$
C$1 + 3x + 3x^{2} + x^{3}$
D$1 + x^{3}$
Answer & Solution
Correct answer: C. $1 + 3x + 3x^{2} + x^{3}$
Coeffs from row 3: 1, 3, 3, 1.
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