SOLUTION: find the coordinates of the vertex for the parabola defined by the given quadratic function f(x)=3x2+18x+8 the vertex is? (need an ordered pair)

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons -> SOLUTION: find the coordinates of the vertex for the parabola defined by the given quadratic function f(x)=3x2+18x+8 the vertex is? (need an ordered pair)      Log On


   

Question 302654: find the coordinates of the vertex for the parabola defined by the given quadratic function
f(x)=3x2+18x+8
the vertex is?
(need an ordered pair)
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Convert to vertex form by completing the square.
g%28x%29=a%28x-h%29%5E2%2Bk
where (h,k) is the vertex.
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f%28x%29=3x%5E2%2B18x%2B8
f%28x%29=3%28x%5E2%2B6x%29%2B8
f%28x%29=3%28x%5E2%2B6x%2B9%29%2B8-27
f%28x%29=3%28x%2B3%29%5E2-19
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(-3,-19)
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