Answer :
The function composition is defined as shown below
[tex](f\circ g)(x)=f(g(x))[/tex]Thus,
[tex](f\circ g)(-2)=f(g(-2))=f(-4)[/tex]And we cannot completely calculate (f∘g)(-2) since we are missing the value of f(-4).
On the other hand, we can calculate the product (fg)(-2) as shown below.
[tex](fg)(x)=f(x)g(x)[/tex]Then,
[tex]\begin{gathered} (fg)(-2)=f(-2)g(-2)=-1\cdot-4=4 \\ \Rightarrow(fg)(-2)=4 \end{gathered}[/tex]The result of the product of functions (fg)(-2) is 4.