Math I have tried it and tried it

posted by .

I have tried several times to find the vertex, line of symmetry, max/min value of the quadratic function.
f(x)=-2x+2x+8
I know I have to do completing the square to answer this but everytime i try to follow the steps I stumble hard! a(x-h)^2+k x= -b/2a
x=-2/2(2)=-2/4=-1/2 x+-1/2
for y f(-1/2)
2(-1/2)^2+2(-1/2)+8

That is all i managed and am certain none of it is right either.

  • Math I have tried it and tried it -

    Okay I think I have this:
    vertex: x=1/2 y=17/2
    equation of line of symmetry: x=1/2
    Maximum value of f(x)=17/2
    Am I correct?

  • Math I have tried it and tried it -

    You are correct
    Good for you!

  • Math I have tried it and tried it -

    Thanks Reiny

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. maths

    how do i find out the the equation of the line of symmetry for f(x)=ax^2+bx+c ?
  2. algebra need help soon

    I have been working on these 2 problems and I think I am confusing myself. I have never tried this site before but it was recommended to me. I appreciate whoever can help me. Thanks in advance The first question is f(x)=-2x^2 + 2x …
  3. algebra urgently need help

    I have been working on these 2 problems and I think I am confusing myself. I have never tried this site before but it was recommended to me. I appreciate whoever can help me. Thanks in advance The first question is f(x)=-2x^2 + 2x …
  4. ALGEBRA

    Find the vertex, the line of symmetry, the maximum or minimum value of the quadratic function. f(x) = -2x^2 + 2x + 9 x coordinate is y coordinate is the equation of the line of symmetry is x = Maximum/minimum of f(x) is the value, …
  5. math please check and help!!!!

    what is the vertex and line symmetry for f(x)=1/2(x+8)^2+4 and what is the max/min value of f(x)?
  6. Math 117

    Find the vertex, line of symmetry, and the max/min value of f(x). Graph the function. f(x)=-3(x+1)^2+3
  7. math

    find the vertex, the line of symmetry, the max or min value of f(x)=2x^2-8x+16
  8. Algebra please help

    f(x)=1/3(x+7)^2+4 find the vertex,the line of symmetry, and the max or min. value of the f(x) graph the function. thank you in advance :)
  9. math:vertex,axis of symmetry,min/max,

    How do i find the vertex,axis of symmetry,min/max value?
  10. Math (Quadratics)

    3. Solve for x in 8x^2 + 2x - 4 = 0 I have tried factoring, taking out a GCF then factoring, completing the square, and got a bunch of wrong answers. I thought we were supposed to complete the square, so maybe I'm just doing that wrong. …

More Similar Questions