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Math Help - pre-calculus help please

  1. #1
    Member OnMyWayToBeAMathProffesor's Avatar
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    pre-calculus help please

    I have total forgotten how to do these, f(x)=4x , h(x)=x+5
    what is (f+h)(x)? Thank you everybody.
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  2. #2
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    (f+h)(x) = f(x) + h(x)
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  3. #3
    Member OnMyWayToBeAMathProffesor's Avatar
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    I knew it was something simple like that, thank you very much for unlocking all of my past knowledge but I still can not remember what these kind of problems of called, are they conjunctions?
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  4. #4
    Member OnMyWayToBeAMathProffesor's Avatar
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    I am sorry, but another quick question, f(x)=4x , h(x)=x+5 , g(x)=x^2

    then f(g(h(x))) = 16x^2+5 or 4(x+5)^2=4x^2+40X+100
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  5. #5
    Super Member 11rdc11's Avatar
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    Nope try again.

    Should be,

    4x^2 + 40x +100
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  6. #6
    Member OnMyWayToBeAMathProffesor's Avatar
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    Thank you, I saw my error and edited my last post, I made a very foolish mistake. the answer is actually 4(x+5)^2=4x^2+40X+100 like you said. Thanks again.
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  7. #7
    Super Member 11rdc11's Avatar
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    No problem glad to help anytime.
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