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Help with functions

  1. Oct 14, 2006 #1
    one of my homework questions is asking to find the equation in standard form when given the roots and one intersecting point. The roots are -2 and 8 and
    point given is -1,16. any help much appreciated.
     
  2. jcsd
  3. Oct 14, 2006 #2
    Is this a quadratic? [tex] f(x) = a(x - h)^2 + k [/tex]
     
    Last edited: Oct 14, 2006
  4. Oct 15, 2006 #3

    HallsofIvy

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    So you know it must be of the form f(x)= a(x-8)(x+2) in order to have those roots. What must a be so that f(-1)= 16?
     
  5. Oct 15, 2006 #4
    it could be its. a function, if you know what that is. for every x value there is only one y value, yes it is possible it's a quadratic.
     
  6. Oct 15, 2006 #5

    HallsofIvy

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    I believe courtrigrad knows what a function is! I suspect his original response was asking whether you know what a quadratic is!:rofl:
     
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