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27 July, 20:12

What are the coordinates of the vertex of y=-x^2-8x+2?

A. (-4,2)

B. (-4,18)

C. (4,2)

D. (4,-46)

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Answers (1)
  1. 27 July, 22:19
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    The vertex is when x=-b/2a

    in this case, b=-8, a=-1, so x = - (-8) / 2 (-1) = - 4

    when x=-4, y = - (-4) ²-8 (-4) + 2=18

    so the answer is B.
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