anonymous
  • anonymous
y=2x^2+4x-8 The axis of symmetry is the line x = ____.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
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jdoe0001
  • jdoe0001
find the vertex for it, usually you could find it with \(\bf \left(-\cfrac{b}{2a}, c-\cfrac{b^2}{4a}\right)\) so the "x" coordinate off the pair, will be the value for the axis of symmetry
anonymous
  • anonymous
what is the answer i will give you a meadl @jdoe0001

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jdoe0001
  • jdoe0001
well, what is it? yeah, well, you tell me :) we help by clearing out some things folks may be off about not by getting answers so they can transcribe them
jdoe0001
  • jdoe0001
I mean, using the \(\bf \left(-\cfrac{b}{2a}, c-\cfrac{b^2}{4a}\right)\) can't get simpler than that
cwrw238
  • cwrw238
you can also find the answer by converting the equation in vertex form
cwrw238
  • cwrw238
y=2x^2+4x-8 y = 2(x^2 + 2x - 4) = 2(x + 1)^2 - 5) = 2 (x + 1)^2 - 10 this is the vertex form te value of x corresponding to the vertex is when x + 1 = 0 - now you can find the line of symmetry
jdoe0001
  • jdoe0001
hmmm, I'd not bother, he just wanted it done for him
cwrw238
  • cwrw238
yea i know but i'm hoping i might cajole him into trying to do something for himself
cwrw238
  • cwrw238
he's gone anyway!!!!
jdoe0001
  • jdoe0001
if he's not going to use a simple equation like the one I posted, very unlikely he'd do a square completion, some folks just misundertand the meaning of "help", sadly
cwrw238
  • cwrw238
yea - i guess you are right - i just thought i'd try...

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