Respuesta :

Answer:

4n² + 12n + 9

Step-by-step explanation:

First, to simplify this expression, you will have to layout the problem like this.

2n (2n) + 2n x 3 + 3 (2n)+ 3 x 3

After,

4n² + 6n + 6n + 9

And Lastly,

4n² + 12n + 9