SOLUTION: what is the axis of symetry if the equation is two x squared plus twelve x plus nine?

Question 303150: what is the axis of symetry if the equation is two x squared plus twelve x plus nine?
Found 2 solutions by Fombitz, stanbon:
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!

Complete the square to put the equation into vertex form.
where the vertex is (,)
The vertex lies on the axis of symmtery.

The axis of symmetry is .
.
.
.

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
what is the axis of symmetry if the equation is two x squared plus twelve x plus nine?
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y = 2x^2+12x+9
a = 2 ; b = 12 ; c = 9
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The axis of symmetry occurs where x = -b/2a
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x = -12/(2*2) = -3
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Cheers,
Stan H.
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