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30 December, 02:11

What is the vertex of the graph

y = - 2x² + 8x + 9?

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Answers (2)
  1. 30 December, 02:14
    0
    Answer: (2, 17)

    Step-by-step explanation:

    The parabola params are: a = - 2, b = 8, and c = 9

    xv = - 8/2 (-2)

    so xv = 2

    yv = - 2 times 2^2+8 times 2+9

    therefore yv = 17
  2. 30 December, 02:24
    0
    (2, 17)

    Step-by-step explanation:

    observe

    y = - 2x² + 8x - 8 + 17

    y = - 2 (x² - 4x + 4) + 17

    y = - 2 (x-2) ² + 17

    so, the vertex is (2, 17)
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