Respuesta :

A = l x w
A = (x+2) ( 3x)
A = 3x^2 + 6x

answer
Area of a rectangle = 3x^2 + 6x
BrainIess
Formular for area is L × B

[tex] =(x+2)(3x) \\ \\ =3x^2+6x [/tex]