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28 May, 10:13

What is the y value of the vertex of 4x^2+8x-8

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Answers (2)
  1. 28 May, 10:39
    0
    Vertex x=-b/2a

    Ax^2+bx+c

    X=-8/2 (4)

    X=-8/8

    X=-1

    Plug in

    4x^2+8x-8

    4 (-1) ^2+8 (-1) - 8

    4 (1) - 8-8

    4-8-8

    -4-8

    -12

    Vertex = (-1,-12)
  2. 28 May, 10:39
    0
    Vertex x=-b/2a

    Ax^2+bx+c

    X=-8/2 (4)

    X=-8/8

    X=-1

    Plug in

    4x^2+8x-8

    4 (-1) ^2+8 (-1) - 8

    4 (1) - 8-8

    4-8-8

    -4-8

    -12

    Vertex = (-1,-12)
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