math

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evaluating functions

For some reason I can't get these 3 problems correct:

g(x) = x^2(x-5)

g(3/2)
g(c)
g(t+2)

Any help would be greatly appreciated.
I contribute as much as I can and I don't seem to get any help. Maybe these are too hard of problems?

  • math -

    I will do one, and check you on the others.

    g(t+2)=(t+2)^2 *(t+2-5)
    = (t^2+2t+4)(t-3)
    = (t^3+2t^2 + 4t -3t^2-6t-12)
    then combine like terms.

  • math -

    Can you tell me if the correct answer for this is
    t^3 -1t^2 -2t -12

  • math -

    correct

  • math -

    it's telling me that this answer is wrong.

    for
    g(c) i got c^3-5c
    and for
    g(3/2) i got -13.something and -8
    but it keeps telling me i'm wrong

    (it means my online class where i am working through these. however, i am not just asking you for answers, i have been sitting here on a friday night trying really hard to learn this and not getting this section...)

  • math -

    isnt g(c)=c^3-5c^2 ?
    g(3/2)=((3 / 2)^2) * ((3 / 2) - 5)

    = -7.87500

  • math -

    can you tell me why it's 5c^2 and not 5c?

  • math -

    f*x)=x^2-5x^2

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