SOLUTION: Which is the equation for the axis of symmetry of y = 1/2x^2 - 2x - 3? a) y = 2 b) x = -2 c) y = -2 d) x = 2

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Question 311605: Which is the equation for the axis of symmetry of y = 1/2x^2 - 2x - 3?
a) y = 2
b) x = -2
c) y = -2
d) x = 2

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Convert to vertex form by completing the square,
y+=+%281%2F2%29x%5E2-2x-3
y+=+%281%2F2%29%28x%5E2-4x%29-3
y=%281%2F2%29%28x%5E2-4x%2B4%29-3-2
y=%281%2F2%29%28x-2%29%5E2-5
x=2.
d) is the correct answer.