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anonymous

  • 4 years ago

identify the direction of the opening of the parabola defined by

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  1. anonymous
    • 4 years ago
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    |dw:1327788278020:dw|

  2. anonymous
    • 4 years ago
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    up down left or right?

  3. anonymous
    • 4 years ago
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    What is the sign on the coefficient of the x^2 term?

  4. anonymous
    • 4 years ago
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    what does that mean?

  5. anonymous
    • 4 years ago
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    Is x^2 negative or positive?

  6. anonymous
    • 4 years ago
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    negative

  7. anonymous
    • 4 years ago
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    Now look at this graph and determine which direction it opens: http://www.wolframalpha.com/input/?i=plot+x%5E2+and+-x%5E2

  8. anonymous
    • 4 years ago
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    down?

  9. anonymous
    • 4 years ago
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    Correct!

  10. anonymous
    • 4 years ago
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    identify the vertex of the parabola defined by |dw:1327789009375:dw|

  11. anonymous
    • 4 years ago
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    If we have\[y = ax^2 + bx + c\]The x-coordinate of the vertex can be found from \[x = - {b \over 2a}\]Then we can plug that value back into the function to get the y-coordinate.

  12. anonymous
    • 4 years ago
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    (-2,1) thanks

  13. anonymous
    • 4 years ago
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    which equation represents one of the steps of solving 6x^2-6x-12=0 by factoring? a. 6x+4=0 or x-3=o b.6x+2=0 or x-6=0 c.2x-2=0 or 3x+6=0 d.x-2=0 or x+1=0

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spraguer (Moderator)
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