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OpenStudy (anonymous):
What is the vertex of the function f(x) = 2x2 + 12x + 9? HELP!?
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OpenStudy (anonymous):
\[ 2(x^2 -6x +(\frac{6}{2})^2 ) +9 - (2)(\frac{6}{2})^2 \]
OpenStudy (anonymous):
\[ = 2(x-9)^2 +18 \\ \text{Vertex is} (9,18)\]
OpenStudy (anonymous):
thanks c:
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