Respuesta :

Answer:

[tex]4x \times 448[/tex]

Step-by-step explanation:

A=

[tex]a = (x - 16)[/tex]

[tex]b = (3x + 28)[/tex]

So you add :

[tex]x \: and3x[/tex]

To get

[tex]4x[/tex]

Then you do :

[tex]16 \times 28[/tex]

To get :

[tex]448[/tex]

Answer is :

[tex]4x \times 448[/tex]