Respuesta :

We have

[tex]f(x)=3x^2+7[/tex]

In order to find f(5y)

[tex]\begin{gathered} f(5y)=3(5y)^2+7 \\ f(5y)=3(25y^2)+7 \\ f(5y)=75y^2+7 \end{gathered}[/tex]