Question 57124
It's finding the y-coordinate of the vertex of this parabola function: 
g(x)= 2x^2+6x+8 
I know how to find the x-coordinate, and when I checked it, I was right, but my answer for the y-coordinate is 7/4 and the book says its supposed to be 7/2
:
Let's just go through the problem: Vertex equation: x = -b/(2a)
In your equation, b = 6 and a = 2
:
x = -6/(2*2)
x = -6/4 reduces to -3/2
:
Find the y coordinate, substitute -3/2 for x in the original equation:
y = 2(-3/2)^2 + 6(-3/2) + 8
y = 2(9/4) - 18/2 + 8
y = 18/4 - 9 + 8
Y - 18/4 - 1
y = 18/4 - 4/4
y = 14/4 reduces to 7/2
:
did this help?