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write the answer as an equation

-1?

\(\large \checkmark\)

It's not that

it is x = -1 if you copied the question correctly

I copied the question right but -1 wasn't the answer

try this one y=-x^2+6x-8

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

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, \[x= -\frac{ b }{ 2a }\]

\[x = - \frac{ (-10) }{ 2(-5) } = -1\]

lool

That would be great... Technology is great when it works, horrible when it doesn't