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anonymous

  • one year ago

What is the vertex of the function f(x) = 7x2 - 28x - 60? (2, -88) (3, 56) (2, 88) (3, -56) confuse...

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

  2. anonymous
    • one year ago
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    -28 b?

  3. anonymous
    • one year ago
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    and 7 a?

  4. Mehek14
    • one year ago
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    \(\dfrac{-(-28)}{2*7}\)

  5. Mehek14
    • one year ago
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    \(\dfrac{28}{14}=2\)

  6. anonymous
    • one year ago
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    28/14=2

  7. Mehek14
    • one year ago
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    the plug 2 into the equation for x

  8. anonymous
    • one year ago
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    oh u did it before i could lol

  9. anonymous
    • one year ago
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    2 is x?

  10. Mehek14
    • one year ago
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    \(f(2)=7*2^2 - 28*2 - 60\)

  11. Mehek14
    • one year ago
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    yes x=2

  12. anonymous
    • one year ago
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    -88?

  13. Mehek14
    • one year ago
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    correct

  14. anonymous
    • one year ago
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    2,-88

  15. Mehek14
    • one year ago
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    yup

  16. anonymous
    • one year ago
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    good to see u back on too lol

  17. Mehek14
    • one year ago
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    :)

  18. anonymous
    • one year ago
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    oh no, i dnt get the next one at all...post here or new post?

  19. Mehek14
    • one year ago
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    new?

  20. anonymous
    • one year ago
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    wait i might be able to do it, let me post it and show my work before u comment to check it?

  21. Mehek14
    • one year ago
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    ok

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spraguer (Moderator)
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is replying to Can someone tell me what button the professor is hitting...

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