Question

What is the line of symmetry of the parabola

Answer 1

y=x^2+6x-9?

Answer 2

I'm kind of lost so i organized this way.
a=\(x^{2}\)
b=6
c=-9
the next this i have to find the formula \(\frac{ -6 }{ 2(a) }\) but i'm confused on this, what do i put for "a".

Answer 3

Oh wait or is that \(\frac{ =6 }{ 2(1) }\) since x=1

Answer 4

HI!!

Answer 5

\(a\neq x^2\) because \(a\) is a number
in this case it is \(a=1\)

Answer 6

Oh okay thank you!
I was actually thinking of that, but i had doubt /:

Answer 7

also \(x\) is a variable, it can be anything, it is not \(x=1\)
but you have the right idea \[-\frac{b}{2a}=-\frac{6}{2\times 1}\]

Answer 8

Oh so basically i was right, and the symmetry line would be x=-3

Thanks misty<3