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DF001

  • one year ago

Help with an Algebra question

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  1. DF001
    • one year ago
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    \[\frac{ 4 }{ t-2 } - \frac{ 8 }{ t ^{2} -2t} = -2\]

  2. DF001
    • one year ago
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    help pls

  3. DF001
    • one year ago
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    i beg

  4. madhu.mukherjee.946
    • one year ago
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    ok

  5. madhu.mukherjee.946
    • one year ago
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    first step take lcm of the denominators

  6. madhu.mukherjee.946
    • one year ago
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    what do you get

  7. DF001
    • one year ago
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    is the lcm t-2(t^2-2t)

  8. madhu.mukherjee.946
    • one year ago
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    yes

  9. DF001
    • one year ago
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    and then i multiple that to the numerators

  10. madhu.mukherjee.946
    • one year ago
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    good

  11. DF001
    • one year ago
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    thankss i think im good from there on :)

  12. madhu.mukherjee.946
    • one year ago
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    then what do you get

  13. DF001
    • one year ago
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    oh im still up to that step lol, i had trouble finding lcd

  14. madhu.mukherjee.946
    • one year ago
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    you need help

  15. madhu.mukherjee.946
    • one year ago
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    it will come to 4t^2-16t+16/(t-2)(t^2-2t)=-2

  16. madhu.mukherjee.946
    • one year ago
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    hey how far did you go

  17. DF001
    • one year ago
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    my answer came out weird

  18. madhu.mukherjee.946
    • one year ago
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    why?

  19. DF001
    • one year ago
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    I multiplied the LCD by the numerators but instead of 4t^2-16t+16 i got 4t^2-16t+8

  20. DF001
    • one year ago
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    |dw:1441777449360:dw|

  21. DF001
    • one year ago
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    this is the first fraction

  22. DF001
    • one year ago
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    oh wait i got 4t^2+16t-16 now

  23. madhu.mukherjee.946
    • one year ago
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    good

  24. DF001
    • one year ago
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    4t^2+16t-16=-2

  25. madhu.mukherjee.946
    • one year ago
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    where did the denominator go

  26. DF001
    • one year ago
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    it was canceled out by the lcd

  27. madhu.mukherjee.946
    • one year ago
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    no i told you what it would be like check my previous 6 th post

  28. madhu.mukherjee.946
    • one year ago
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    4t^2-16t+16/(t-2)(t^2-2t)=-2

  29. DF001
    • one year ago
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    doesnt the denominator get canceled out by the lcd when multiplying the numerator?

  30. madhu.mukherjee.946
    • one year ago
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    no

  31. DF001
    • one year ago
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    |dw:1441777787854:dw|

  32. DF001
    • one year ago
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    i was taught this way by my teacher

  33. madhu.mukherjee.946
    • one year ago
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    you will get 2[(t-2)(t^2-2t)]=4t^2-16t+16 cross multiply

  34. madhu.mukherjee.946
    • one year ago
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    no baby you were taught wrong

  35. madhu.mukherjee.946
    • one year ago
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    one thing you can do to simplify your equation

  36. madhu.mukherjee.946
    • one year ago
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    you know how to do middle term breaking?

  37. DF001
    • one year ago
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    no i have never heard of that

  38. madhu.mukherjee.946
    • one year ago
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    oh

  39. madhu.mukherjee.946
    • one year ago
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    but without mid term this would be difficult

  40. DF001
    • one year ago
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    this problem is the hardest problem on my homework :(

  41. madhu.mukherjee.946
    • one year ago
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    will you be able to learn mid term if i teach you

  42. DF001
    • one year ago
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    I will try but Im a slow math learner

  43. DF001
    • one year ago
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    But lately my teacher use only lcd but this question is weird

  44. madhu.mukherjee.946
    • one year ago
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    http://www.ask-math.com/quadratic-factorization-using-splitting-of-middle-term.html

  45. madhu.mukherjee.946
    • one year ago
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    go to this page and see what you can understand

  46. DF001
    • one year ago
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    okay

  47. madhu.mukherjee.946
    • one year ago
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    didi you understand anything

  48. madhu.mukherjee.946
    • one year ago
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    @DF001

  49. madhu.mukherjee.946
    • one year ago
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    hey i've got another easy way of solving this,do you need it

  50. madhu.mukherjee.946
    • one year ago
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    see 4t^2-16t+16=0 it is a quadratic equation so if take 4 common from the entire equation we will have t^2-4t+4=0

  51. madhu.mukherjee.946
    • one year ago
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    now you know the formula-(a-b)^2 a^2-2ab+b^2

  52. madhu.mukherjee.946
    • one year ago
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    see 4t^2-16t+16=0 it is a quadratic equation so if take 4 common from the entire equation we will have t^2-4t+4=0

  53. madhu.mukherjee.946
    • one year ago
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    so now (t-2)^2=t^2-4t+4

  54. madhu.mukherjee.946
    • one year ago
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    so now we can write|dw:1441780923538:dw|

  55. madhu.mukherjee.946
    • one year ago
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    |dw:1441780968546:dw|

  56. madhu.mukherjee.946
    • one year ago
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    by cross multiplying we get|dw:1441781055816:dw|

  57. madhu.mukherjee.946
    • one year ago
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    this is again a quadratic equation and now you got to do mid term breaking

  58. madhu.mukherjee.946
    • one year ago
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    |dw:1441781481309:dw|

  59. madhu.mukherjee.946
    • one year ago
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    so now |dw:1441781642659:dw|

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