SOLUTION: Find the axis of symmetry. y = x^2 + 5x – 7

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Question 104070: Find the axis of symmetry.
y = x^2 + 5x – 7
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Find the axis of symmetry.
y = x^2 + 5x – 7
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Put in vertex form by completing the square on the x-terms:
x^2+5x+? = y+7+?
x^2+5x+(5/2)^2 = y+7+(5/2)^2
(x+(5/2))^2 = y+(53/4)
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Vertex: (-5/2, -53/4)
Axis: x = -5/2
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graph%28400%2C300%2C-10%2C10%2C-15%2C10%2Cx%5E2%2B5x-7%29
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Cheers,
Stan H.