Answer :

Given

[tex]\begin{gathered} f(x)=3x^2-6 \\ g(x)=5-5x \end{gathered}[/tex]

Procedure

[tex]\begin{gathered} (f\circ g)(x)=f(g(x)) \\ (f\circ g)(x)=3(5-5x)^2-6 \\ (f\circ g)(x)=3(25-50x+25x^2)-6 \\ (f\circ g)(x)=75x^2-150x+69 \end{gathered}[/tex]

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