SOLUTION: Give the equation of the axis of symmetry of y = -x^2 - 3x - 5.

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Question 184469: Give the equation of the axis of symmetry of y = -x^2 - 3x - 5.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Give the equation of the axis of symmetry of y = -x^2 - 3x - 5.
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Complete the square on the "x" terms.
-x^2 - 3x = y+5
-(x^2 + 3x +?) = y+5-?
-(x^2 + 3x + (3/2)^2) = y+5 -(3/2)^2
-(x+(3/2))^2 = y + 20/4 -9/4
-(x+3/2)^2 = y + 11/4
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Axis of symmetry: x = -3/2
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graph%28400%2C300%2C-10%2C10%2C-20%2C10%2C-x%5E2-3x-5%29
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Cheers,
Stan H.