find the axis of symmetry for this parabola y=-5x^2-10x-13

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find the axis of symmetry for this parabola y=-5x^2-10x-13

Mathematics
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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write the answer as an equation
complete the square \(y=-5x^2-10x-13\) might be easier to do it starting with this \(y=-5[x^2+2x+\frac{13}{5}]\)
-1?

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It's not that
it is x = -1 if you copied the question correctly
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I copied the question right but -1 wasn't the answer
try this one y=-x^2+6x-8
@Kaelyn78 you want us do your homework, don't you?
you could do that one in your head!
these are practice problems, not homework
this paper is not graded
and no I can't, I don't know how to find the axis of symmetry in my head
we still haven't finished the first one if the answer is not x = -1, what is it?!
I don't know, that's why I posted it here.
1 or -1
The first one, @IrishBoy123 showed you all the steps + proof. You said it is not the right answer without any reason. I am with him and don't get why you go to other one without finish the first one. :)
do it another way \(y=-5x^2-10x-13\) \(y' = -10 x - 10\) \(y' = 0 \implies x = -1\)
because I entered that answer into the computer and it said it isn't right
Irish boy is right!
Computers don't lie, and they don't give you an explanation of why it's wrong
I came to the same conclusion he had, I agree with him, but the computer doesn't.
You can check another way by finding the vertex, \[x= -\frac{ b }{ 2a }\]
\[x = - \frac{ (-10) }{ 2(-5) } = -1\]
Guys they don't give you an option to do the problem a second time. I entered the answer and it was wrong so I just have to move on to the next question. Proving it to me over and over again will not change anything.
If you ever meet the developers of the program I'm working with you can argue with them about that. Thank you all for your help on that problem.
put each new question in a new thread and let's see if we can sort out that pesky computer of yours. perhaps you should wire it to a lie detector :p
lool
That would be great... Technology is great when it works, horrible when it doesn't

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