To find f(x)*g(x) multiply the expressions given for each function:
[tex]f(x)\cdot g(x)=(x^2+3x-40)(x-5)[/tex][tex]\begin{gathered} (x^2+3x-40)(x-5) \\ x^3-5x^2+3x^2-15x-40x+200 \\ x^3-2x^2-55x+200^{} \end{gathered}[/tex]The answer is already in standard form because its terms are ordered from the greatest power of x to the lowest one.