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kristinak

  • one year ago

A quadratic equation is shown below: x2 - 8x + 13 = 0 Which of the following is the first correct step to write the above equation in the form (x - p)2 = q, where p and q are integers? Subtract 5 from both sides of the equation Subtract 3 from both sides of the equation Add 5 to both sides of the equation Add 3 to both sides of the equation

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  1. myininaya
    • one year ago
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    do you know how to complete the square? let's practice do you think x^2-2x+1 can be written as a square?

  2. kristinak
    • one year ago
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    yes

  3. kristinak
    • one year ago
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    @myininaya

  4. kristinak
    • one year ago
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    i was thnking it was D?

  5. myininaya
    • one year ago
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    can you write is as a square for me?

  6. kristinak
    • one year ago
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    (X-1)^2

  7. myininaya
    • one year ago
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    okay so if you do that then we have x^2-8x+13+3=0+3 x^2-8x+16=3

  8. myininaya
    • one year ago
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    so are you think x^2-8x+16 can be written as square?

  9. myininaya
    • one year ago
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    and you are right about my example

  10. kristinak
    • one year ago
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    Yes

  11. myininaya
    • one year ago
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    x^2-8x+16 can be written as (x- ? )^2

  12. myininaya
    • one year ago
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    what is ?

  13. kristinak
    • one year ago
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    (x-4)^2

  14. myininaya
    • one year ago
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    yeah

  15. myininaya
    • one year ago
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    you did this all by yourself @kristinak

  16. kristinak
    • one year ago
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    yeah but i still dont know the answer

  17. myininaya
    • one year ago
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    you are saying we have (x-4)^2=3

  18. myininaya
    • one year ago
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    4 and 3 are totally integers

  19. kristinak
    • one year ago
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    so its b?

  20. myininaya
    • one year ago
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    :(

  21. myininaya
    • one year ago
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    Can you tell me where you are confused on your first choice?

  22. kristinak
    • one year ago
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    i thought you said i was wrong when i said it was D?

  23. myininaya
    • one year ago
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    never said that

  24. myininaya
    • one year ago
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    i simply was working through what D would have given us

  25. myininaya
    • one year ago
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    do you not think 4 and 3 are integers?

  26. kristinak
    • one year ago
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    No they are

  27. kristinak
    • one year ago
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    thank you so much, sorry i was confused

  28. myininaya
    • one year ago
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    its okay

  29. kristinak
    • one year ago
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    can you help me with another?

  30. myininaya
    • one year ago
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    alright

  31. kristinak
    • one year ago
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    one moment

  32. kristinak
    • one year ago
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    1 Attachment
  33. kristinak
    • one year ago
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    @myininaya

  34. kristinak
    • one year ago
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    its the screenshot

  35. myininaya
    • one year ago
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    can you find the vertex for the first one?

  36. kristinak
    • one year ago
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    one moment

  37. kristinak
    • one year ago
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    (70,55)

  38. kristinak
    • one year ago
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    am i right?

  39. myininaya
    • one year ago
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    beautiful!

  40. myininaya
    • one year ago
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    now the vertex is very important for consider the min or even the max for a parabola that is why i asked for the other graph i think a good way to approximate the vertex is just plot those points given

  41. myininaya
    • one year ago
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    i want you to speculate on what you think the vertex is

  42. myininaya
    • one year ago
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    now it helped me to actually plot the points so i encourage you to do so

  43. myininaya
    • one year ago
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    tell me what you think looks like the middle point of that graph

  44. kristinak
    • one year ago
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    (1,899.50)

  45. myininaya
    • one year ago
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    that is very great

  46. myininaya
    • one year ago
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    now the y values for each of these points is the amount of min production cost from each graph

  47. myininaya
    • one year ago
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    aka lowest y value for each graph

  48. myininaya
    • one year ago
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    the question ask you to compare the y values basically it ask which one is greater

  49. kristinak
    • one year ago
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    company 2?

  50. myininaya
    • one year ago
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    right because 899.5>55 so company 2 has a bigger min production cost

  51. kristinak
    • one year ago
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    thank you!! can you help me with like 2 or 3 more?

  52. myininaya
    • one year ago
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    honestly i cannot i have to leave i suggest posting a new question

  53. kristinak
    • one year ago
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    oh okay thank you

  54. myininaya
    • one year ago
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    np have a great night

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