Question

Identify the vertex for the graph of y = 2x2 + 8x − 3.

Answer 1

The overall formula to find the x-coordinate of the vertex, based on y=ax^2+bx+c, is -b/2a.
All you have to do is plug in the a and the b to their respective spots:
-8/4 which simplifies to -2. Now that is your x coordinate of the vertex. All you have to do is plug x into the equation and solve for y:
y= 2(-2)^2 + 8(-2) -3
y= 8 - 16 - 3
y= -11

Your vertex is (-2, -11)

Answer 2

wow, thanks flixoe