Respuesta :

[tex]\begin{gathered} y=7 \\ z=1 \end{gathered}[/tex][tex]3(y+z)^2-5y[/tex][tex]\begin{gathered} 3(7+1)^2-5y \\ 3(8)^2-5(7) \\ 3(64)-35 \\ 192-35=157 \end{gathered}[/tex]