Respuesta :

Answer:

  • D. x + 4

Step-by-step explanation:

Let's factor the trinomial:

  • x² + 14x + 40 =
  • x² + 4x + 10x + 40 =
  • x(x + 4) + 10(x + 4) =
  • (x + 4)(x + 10)

x + 4 is between the answer options

Correct option is D.