Question

Find the cube of: a + 2

Answer 1

(a + 2)³ = (a)³ + (2)³ + 3×a×2(a + 2)

= a³ + 8 + 6a(a+ 2)

= a³ + 8 + 6a² + 12a

= a³ + 6a² + 12a+ 8