What is the vertex and axis of symmetry for y=2x^+6x+5

Question

parthkohli · Answer

For a parabola, do you know what the vertex is?

parthkohli · Answer

I mean there's a formula to find the coordinates of the vertex.  Are you aware of that?

anonymous · Answer

The vertex is (-3/2,1/2)

luigi0210 · Answer

Find the vertex using -$\large \frac{b}{2a}$ for the x-coordinate. Plug it back in to get y.

parthkohli · Answer

Yes, that is very much it.  For the second part, do you see how the axis of symmetry of a parabola is?|dw:1397077680326:dw|

parthkohli · Answer

It's basically a vertical line passing through the vertex.  So it'd have $x = -\dfrac{b}{2a}$ everywhere.

parthkohli · Answer

@linda3 please help!

linda3 · Answer

I think you got it right @ParthKohli

luigi0210 · Answer

Check it using calc as well.. for us. 
$\frac{d}{dx}2x^2+6x+5=4x+6$
So the vertex is at $x=\frac{-3}{2}$ like they said.

anonymous · Answer

the function is not symmetric with respect to the y-axis or the origin.