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Homework Help: What math is this?

  1. Jul 3, 2010 #1
    We are studying linear equations in school and the prof gave us this to solve for extra credit:

    f(x+a) = f(x^2+a)
    what is x?

    I dunno what type of equation that is, so I can't even start a solution. Can anyone help guide me in the right direction?
     
  2. jcsd
  3. Jul 3, 2010 #2

    IBY

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    Well, what number do you have to plug in to x to get:
    [tex]x=x^2[/tex]?
    Because, since both are the same functions, then the numbers being inserted, assuming it is a linear function, must be the same, so:
    [tex]x+a=x^2+a[/tex]
     
  4. Jul 3, 2010 #3

    arildno

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    CBREnt:
    Did your professor say that linear function are..invertible?
     
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