Question

Find the coefficient of x in the expansion of (x + 3)³

Answer 1

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.