Respuesta :

Answer:

[tex]12x^{2} +14x+4[/tex]

Step-by-step explanation:

3x *4x = [tex]12x^{2}[/tex]

[tex]3x+4x*2=14x[/tex]

2 + 2 = 4

[tex]12x^{2} +14x+4[/tex]