Question

find the vertex, line of symmetry and range, -x^2-4x-1

Answer 1

\[\Huge \frac{-b}{2a}\]

Answer 2

I need someone to walk me thru

Answer 3

I think
vertex(-2,3)
line of symmetry x=-2

Answer 4

I didn't get that

Answer 5

let y=-x^2-4x-1
y=-((x+2)^2-3)
so vertex is (-2,3)
and it'll be symmetrical to line x=-2

Answer 6

and range is (-infnity,3)

Answer 7

I don't see where you get -3 in your y=((x+2)^2-3)

Answer 8

take - common in expression and 3 and -3 in expression so y=-(x^2+4x+1+3-3)
y=-(x^2+4x+4-3),
so y=-((x+2)^2-3)

Answer 9

Where does +3 and -3 come from????

Answer 10

in any algebric expression ,if you add "a" and subtract "a" then it does not change the expression

Answer 11

I appreciate your help but I don't get it. Thank you for your time.