Answer :
w (x) = x2 + 3x + 8
w (4) =?
we know that
W(4) is the value of the function w(x) when the value of x is equal to 4
so
substitute
For x=4
[tex]\begin{gathered} w(4)=(4^2)+3(4)+8 \\ w(4)=16+12+8 \\ w(4)=36 \end{gathered}[/tex]therefore
w(4)=36