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

1. May 6, 2009

### squirt552

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. May 6, 2009

### tiny-tim

Welcome to PF!

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

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

then that means that - b/2a = … ?