Question

resolva o produto notável: (x+2)³

Answer 1

(x + 2)³ = (x + 2)² (x + 2)
(x + 2)³ = (x² + 4x + 4)(x + 2)
(x + 2)³ = x³ + 6x² + 12x + 8

Answer 2

(x+2)³ = 
(x+2)² . (x+2) =
(x² + 4x + 4) . (x+2) =
(x + 2) (x² + 4x + 4) =
x(x² + 4x + 4) + 2 (x² + 4x + 4) =
x³ + 4x² + 4x + 2x² + 8x + 8 =
x³ + 6x² + 12x + 8 

Resposta: x³ + 6x² + 12x + 8