Question

Expand (3 + m)³ 

Answer 1

(3 + m)³

Comparing (3 + m)³ with (a + b)³ we have a = 3, b = m

(a + b)³ = a² + 3a²b + 3ab² + b³

(3 + m)³ = 3³ + 3(3)²(m) + 3(3)m² + m³

= 27 + 27m + 9m² + m³

= m³ + 9m² + 27m + 27