Respuesta :

Answer:

A=6(9n^2+26n+36)

Step-by-step explanation:

A=6s^2

s=3n+6

A=6(3n+6)^2

A=6(3n+6)(3n+6)

A=6(9n^2+18n+18n+36)

A=6(9n^2+26n+36)

I hope this helps; please award brainliest!