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anonymous

  • 5 years ago

A. x = 2 B. x = 2.5 C. x = -1 D. x = 0.5

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  1. anonymous
    • 5 years ago
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    So what's the question?

  2. anonymous
    • 5 years ago
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    x^2-3x=-5/4 Which choices are solutions to the following equation?

  3. anonymous
    • 5 years ago
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    Have you tried using the quadratic equation?

  4. anonymous
    • 5 years ago
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    no how ?

  5. anonymous
    • 5 years ago
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    this is the quadratic:\[-b \pm \sqrt{b ^{2}-4ac}/2a\]

  6. anonymous
    • 5 years ago
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    is it -1

  7. anonymous
    • 5 years ago
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    sorry it didnt come out right http://en.wikipedia.org/wiki/Quadratic_equation

  8. anonymous
    • 5 years ago
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    no its going to be two values

  9. anonymous
    • 5 years ago
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    so you first want to set the given equation =0 kk? How do you do that?

  10. anonymous
    • 5 years ago
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    yea -1 and 2

  11. anonymous
    • 5 years ago
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    do wht .

  12. anonymous
    • 5 years ago
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    \[x ^{2}-3x+5/4\]

  13. anonymous
    • 5 years ago
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    all that =0

  14. anonymous
    • 5 years ago
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    wht ? confused .

  15. anonymous
    • 5 years ago
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    whts tht equation for .

  16. anonymous
    • 5 years ago
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    kk wait

  17. anonymous
    • 5 years ago
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    okay

  18. anonymous
    • 5 years ago
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    \[ax ^{2} + bx + a =0 \] where you plug is a b c in the quadratic equation \[(-b \pm \sqrt{b ^{2}-4ac})/(2a)\]

  19. anonymous
    • 5 years ago
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    to get to values

  20. anonymous
    • 5 years ago
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    can you tell me the answer please .

  21. anonymous
    • 5 years ago
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    in this case a=1 b=-3 a=5/4

  22. anonymous
    • 5 years ago
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    umm just plug it in I gave you want to plug in

  23. anonymous
    • 5 years ago
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    it didnt give me no answer

  24. anonymous
    • 5 years ago
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    just plug in x =2, x = 2.5, x = -1 and x = 0.5 in the equation and see which value solves it. That will be your answer.

  25. anonymous
    • 5 years ago
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    im still aint geting no answer something wrong

  26. anonymous
    • 5 years ago
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    put x = 2 in \[x ^{2}-3x = -5/4\]

  27. anonymous
    • 5 years ago
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    you will get \[2^{2}-3*2 = -5/4 => 4-6 = -5/4=>-2=-5/4\]

  28. anonymous
    • 5 years ago
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    idk can i have the answer please .

  29. anonymous
    • 5 years ago
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    -2 is obviously not equal to -5/4. so x = 2 is not the answer. similarly put x = 2.5, x = -1, x = 0.5 in the equation and see which one solve the equation

  30. anonymous
    • 5 years ago
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    No, i can't do your problem for you. I can only show you how to do your problem

  31. anonymous
    • 5 years ago
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    well , i dont know how to do this so . its only right if you do .

  32. anonymous
    • 5 years ago
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    I showed you how to do it. just follow the steps.

  33. anonymous
    • 5 years ago
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    rd can you tell me how to put it in the calculator .

  34. anonymous
    • 5 years ago
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    Do you you know how to square things?\[X^2 \] ?

  35. anonymous
    • 5 years ago
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    yess that = 1/2

  36. anonymous
    • 5 years ago
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    no \[x^2 = x \times x\]

  37. anonymous
    • 5 years ago
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    1/4

  38. anonymous
    • 5 years ago
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    so just replace x with the given values and if the the equation makes sense then it works.

  39. anonymous
    • 5 years ago
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    Do you know how to multiply and subtract?

  40. anonymous
    • 5 years ago
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    yeaa

  41. anonymous
    • 5 years ago
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    then just replace X with all the given values

  42. anonymous
    • 5 years ago
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    and if the equation makes sense then thats one of the answers

  43. anonymous
    • 5 years ago
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    so you sayinq 1/4 subtract all choices .

  44. anonymous
    • 5 years ago
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    how did you get 1/4

  45. anonymous
    • 5 years ago
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    1/2*1/2

  46. anonymous
    • 5 years ago
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    well i got -1 thts the only answer i got

  47. anonymous
    • 5 years ago
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    but its two answers

  48. anonymous
    • 5 years ago
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    why is it two answers?

  49. anonymous
    • 5 years ago
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    - 1 and 0.5

  50. anonymous
    • 5 years ago
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    then you must have done some calculation wrong. Post what you got when you substituted x = 0.5

  51. anonymous
    • 5 years ago
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    cant view pics, permission denied.

  52. radar
    • 5 years ago
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    Your reluctance to substitute the answers from using the quadratic formula is discouraging. The two answers you should of gotten were 5/2, AND 1/2. Substituting the 5/2 into your original formula would of resulted in:\[(5/2)^{2}-15/2+5/4=0\] 25/4-15/2+5/4=0 25/4-30/4+5/4=0 0=0 5/2 is a good answer. Now check out the 1/2

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