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Sheridan16

  • 2 years ago

What's the vertex of y=x^2+6x+8?(

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  1. BluFoot
    • 2 years ago
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    x-coordinate of vertex when y=ax^2+bx+c = -b/2a

  2. abb0t
    • 2 years ago
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    Start by completing the square first.

  3. BluFoot
    • 2 years ago
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    Once you have the x-coordinate you can easily solve for y-coordinate by plugging in

  4. Helly
    • 2 years ago
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    the answer is {-3,-1} have a nice day=D

  5. abb0t
    • 2 years ago
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    HINT: Remember that the vertex form is: \[y = a(x-h)^2+k\]

  6. Helly
    • 2 years ago
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    aw thanks=D Im really good with problems that don't involve words lol

  7. abb0t
    • 2 years ago
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    giving away the answer doesn't help the person learn, @Helly :P

  8. Helly
    • 2 years ago
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    SORRY=(

  9. Sheridan16
    • 2 years ago
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    How do you figure out if its the maximum or minimum?

  10. BluFoot
    • 2 years ago
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    Is the curve going up or down? Look at the sign of "a"

  11. abb0t
    • 2 years ago
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    You could take a few derivatives.

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