Respuesta :

adioabiola

Answer:

(7x² + 5) ( x + 3)

Step-by-step explanation:

7x²(x + 3) + 5(x+3)

Factor out x + 3

(7x² + 5) ( x + 3)

7x³ + 21x² + 5x + 15

Factorize

7x²(x + 3) + 5(x + 3)

(7x² + 5) ( x + 3)