Respuesta :

Answer:

[tex]3x^2-3[/tex]

Step-by-step explanation:

We have [tex](3x^2 + 16x + 9) + (-16x - 12)[/tex]

To figure out the sum, you need to add like terms.

It would look like this:

[tex]3x^2 + 16x - 16x + 9 - 12[/tex]

=[tex]3x^2-3[/tex]