Respuesta :

Annder

Step-by-step explanation:

(x+4)(x²+5x+5)

= (x³+5x²+5x+4x²+20x+20)

= x³+9x²+25x+20

Sequiera

Answer:

Step-by-step explanation:

(x+4)(x²+5x+5) =

x×x²+x×5x+5x+4x²+4×5x+4×5 =

x³+5x²+4x²+20x+40 =

x³+9x²+20x+40