Answer :
We have,
[tex]\begin{gathered} f(x)=x^3-9x \\ g(x)=x^2 \end{gathered}[/tex]To find (fºg)(x), we need to solve f(g(x)),
[tex](f\circ g)(x)=f(g(x))=(x^2)^3-9(x^2)=x^6-9x^2[/tex]
We have,
[tex]\begin{gathered} f(x)=x^3-9x \\ g(x)=x^2 \end{gathered}[/tex]To find (fºg)(x), we need to solve f(g(x)),
[tex](f\circ g)(x)=f(g(x))=(x^2)^3-9(x^2)=x^6-9x^2[/tex]