Respuesta :

[tex]\bf \begin{cases} f(x)=2x-4\\ g(x)=x^2 \end{cases}\implies f(~~ g(x)~~)=2[g(x)]-4 \\\\\\ f(~~ g(x)~~)=2[x^2]-4\implies f(~~ g(x)~~)=2x^2-4[/tex]

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