SOLUTION: i need to find the vertex, symmentry axis does graph go up or down and graph y=2x^2 +8x + 16

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Question 242434: i need to find the vertex, symmentry axis does graph go up or down and graph
y=2x^2 +8x + 16
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
i need to find the vertex, symmentry axis does graph go up or down and graph
y=2x^2 +8x + 16
a = 2 ; b = 8 ; c = 16
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Up or Down?
Since a > ) the parabola opens up.
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Vertex?
Occurs when x = -b/2a = -8/(2*2) = -2
f(-2) = 2(4)- 16 +16 = 8
Vertex:(-2,8)
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Axis of symmetry?
x = -b/2a = -2
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Graph?
graph%28400%2C300%2C-10%2C10%2C-10%2C40%2C2x%5E2%2B8x%2B16%29
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Cheers,
Stan H.