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anonymous

  • one year ago

Identify the vertex for the graph of y = -2x2 - 12x + 1. (-3, 19) (-3, 55) (3, -53) (3, -47) I tried this using GeoGebra but it didnt add up.

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  1. anonymous
    • one year ago
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    @welshfella

  2. triciaal
    • one year ago
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    |dw:1439661674691:dw|

  3. triciaal
    • one year ago
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    you can convert by completing the square vertex (h, k)

  4. anonymous
    • one year ago
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    I learned that stuff in my lesson. But was very confused on were to put what. Also, wouldn't just graphic it show you were the vertex's is?

  5. triciaal
    • one year ago
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    yes you can always solve by graphing. either set up a table and plot (x, y) values or use that when y = 0 you get the x-intercepts and when x= 0 you have the y-intercept the line through the vertex is the "mirror" or half the parabola the x-value of the vertex is the line of symmetry

  6. anonymous
    • one year ago
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    Im still a bit confused, could you walk me through?

  7. triciaal
    • one year ago
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    |dw:1439662221348:dw|

  8. anonymous
    • one year ago
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    ohhhhhh, ok.

  9. triciaal
    • one year ago
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    |dw:1439662692924:dw|

  10. anonymous
    • one year ago
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    Omg! I have been trying to under the "a, b & c" part for WEEKS! TY TY TY TY SO MUCH

  11. triciaal
    • one year ago
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    now you know forever you are welcome

  12. iYuko
    • one year ago
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    @triciaal Thanks for the math lesson. I took notes. c:

  13. triciaal
    • one year ago
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    @iYuko you are so welcome

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