Respuesta :

Answer:

9x ^2 + 33x + 28

Step-by-step explanation:

(3x + 7)(3x + 4)

9x^2+ 21x+ 12x + 28

9x^2 + 33x + 28

Hope it helps!

Step-by-step explanation:

(3x+7)(3x+4)

9x²+21x+12x+28

9x²+33x+28