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Answer on Calculus Question for shasha

Question #42996
Find the vertex of the graph of the function.

f(x) = 2x2 - 8x + 9

help me please
Expert's answer
In the quadratic equation ax^2+bx+c=0 the vertex could be found from this formula: -b/(2a).
 For our equation we obtain -(-8)/(2*2)=2. 

  Answer. x=2. 

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