Respuesta :

Answer:

[tex] = - 7 {n}^{2} - 49 + 8 {n}^{3} + 56n \\ = - 7( {n}^{2} + 7) + 8n( {n}^{2} + 7) \\ = \boxed{ ( {n}^{2} + 7)(8n -7 )}[/tex]