Solution:
Given;
[tex]\begin{gathered} f(x)=x^2+3x-4 \\ \\ g(x)=x+5 \end{gathered}[/tex]
The product of the function is;
[tex]\begin{gathered} f(x)\cdot g(x)=(x^2+3x-4)(x+5) \\ \\ f(x)\cdot g(x)=x^3+8x^2+11x-20 \end{gathered}[/tex]
CORRECT OPTION:
[tex]\begin{equation*} x^3+8x^2+11x-20 \end{equation*}[/tex]
