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Thread: f(x) question!!

  1. #1
    Junior Member
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    f(x) question!!

    The question is, Given f(x)= x(x-3), find f(x-10)

    I tried to do it and the answer i got is

    x^2 -3x +70

    Just want to know if my answer is correct? Thanks
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  2. #2
    MHF Contributor
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    Quote Originally Posted by fvaras89 View Post
    The question is, Given f(x)= x(x-3), find f(x-10)

    I tried to do it and the answer i got is

    x^2 -3x +70

    Just want to know if my answer is correct? Thanks

    $\displaystyle f(x)=x(x-3)$

    $\displaystyle f(x-10)=(x-10)(x-10-3)$

    $\displaystyle =(x-10)(x-13)$

    $\displaystyle =x^2-13x-10x+130$

    $\displaystyle
    =x^2-23x+130
    $
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