Find the coefficient of x in the expansion of (x + 3)³
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Answer:
Step-by-step explanation:
(x + y)³ = x³ + y³ + 3xy(x + y)
⇢(x + 3)³ = x³ + 27 + 3(x)(3)( x + 3)
⇢(x + 3)³ = x³ + 27 + 9x(x + 3)
⇢(x + 3)³ = x³ + 27 + 9x² + 27x
Therefore, the coefficient of x is 27.
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