Respuesta :

pegah
you can say : ( v + 4 )( v + 4 ) = v ^2  + 4v + 4v + 4^2 = v^2 + 8v + 16 thats the answer :))
i hope this is helpful 
have a nice day 
Exvited
[tex](v+4)^2 \\ \\ v^2 + 2v \times 4 + 4^2 \\ \\ v^2 + 2v \times 4 + 16 \\ \\ v^2 + 8v + 16 \\ \\ Answer: v^2 + 8v + 16 [/tex]