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Are these two phrases the same . I am not sure what it is asking for.

  1. May 6, 2009 #1
    1. The problem statement, all variables and given/known data

    First example f(x)=1/4 (x+4)^2 +7
    Asks for vertex and the line of symmetry and the value of f(x) and maximim or minimum
    This is no problem vertex= (-4,7) line of symmetry is -4 value f(x)= 7


    second problem f(x)=x^2 -10x -2

    vertex (5, -27)
    but now ask for the equation of the line of symmetry


    Is: the line of symmetry and: the equation of the line of symmetry the same thing?

    information shows the line of symmetry is x= - b/2a. okay so how do I show this as an equation if the line of symmetry is 5
    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. May 6, 2009 #2

    tiny-tim

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    Welcome to PF!

    Hi squirt552! Welcome to PF! :smile:
    hmm … line of symmetry is x = -4 :wink:
    Well, you have to describe the line in some way, and the easiest (and only sensible) way is by using an equation, so … yes! :smile:
    (you mean x = 5)

    Well, if the line of symmetry is x= - b/2a and x = 5,

    then that means that - b/2a = … ? :smile:
     
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