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? asked in Science & MathematicsMathematics · 5 years ago

Let ​f(x)=x^2 - 9 and ​g(x) =x^3. Simplify or evaluate the function​ g(f(u)).?

Find​ g(f(u)). Do not expand your answer.

3 Answers

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  • Michael
    Lv 4
    5 years ago
    Favorite Answer

    real simple.

    f(u) = u^2 - 9

    g(u^2 - 9)

    g(u^2 - 9) = (u^2 - 9)^3

    it's just sub. in for x.

    Source(s): year 10 student.
  • ?
    Lv 7
    5 years ago

    ​f(x)=x²-9

    g(x) =x³

    g(f(u)) =(u²-9)³

  • Paladin
    Lv 7
    5 years ago

    plug the f-function in for the x in the g-function

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