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24 November, 06:09

F (x) = -x^2 + 4x+5

Find the vertex

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Answers (1)
  1. 24 November, 06:16
    0
    Vertex formula: - b/2a

    b=4

    a=-1

    -4/2 (-1)

    = - 4/-2

    = 2

    Plug 2 for x in the equation, and you will get y = 9

    Vertex: (2,9)
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