Respuesta :

Answer:

[tex]x^2 + 11x + 28[/tex]

Step-by-step explanation:

(x + 7)(x + 4) = x(x + 4) + 7(x + 4) = x*x + x*4  +  7*x + 7*4 = x*x + 11*x + 28

2x+12

Step-by-step explanation:

Common like terms