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HelloKitty17

  • one year ago

Identify the vertex for the graph of y = 2x2 + 8x - 3. (2, 21) (2, 17) (-2, -11) (-2, -27)

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  1. Mehek14
    • one year ago
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    \(\dfrac{-b}{2a}\) <--- formula

  2. Mehek14
    • one year ago
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    \(\dfrac{-8}{2*2}=\dfrac{-8}{4}=-2\\x=-2\)

  3. Mehek14
    • one year ago
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    plug that into the equation \(y=2*-2^2+8*-2-3\\2*4-16-3\\8-19=-11\)

  4. Mehek14
    • one year ago
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    so C

  5. HelloKitty17
    • one year ago
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    dang it i got it wrong in my head

  6. OregonDuck
    • one year ago
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    thxs

  7. Mehek14
    • one year ago
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    did you try the formula?

  8. Mehek14
    • one year ago
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    @OregonDuck why thanks?

  9. HelloKitty17
    • one year ago
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    thanks for the help

  10. OregonDuck
    • one year ago
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    for the answer

  11. Mehek14
    • one year ago
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    but it's @HelloKitty17 's question?

  12. OregonDuck
    • one year ago
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    yeah i am helping her she is my sis

  13. Mehek14
    • one year ago
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    oooooooooooohhhhhhhhhh

  14. HelloKitty17
    • one year ago
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    hi

  15. Mehek14
    • one year ago
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    i didn't know that

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spraguer (Moderator)
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