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Firejay5 Group Title

Simplify. Use long division to solve. Subtract your answers, NOT add 10. (x^3 + 13x^2 - 12x - 8) / (x + 2)

  • one year ago
  • one year ago

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  1. Firejay5 Group Title
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    My answer is -72, but I don't know what to do next

    • one year ago
  2. Australopithecus Group Title
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    https://www.youtube.com/watch?v=l6_ghhd7kwQ watch this video

    • one year ago
  3. .Sam. Group Title
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    Setup the long division as follows, solve by dividing . (x^3 + 13x^2 - 12x - 8) with (x + 2)

    • one year ago
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  4. Australopithecus Group Title
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    it teaches you long division of polynomials

    • one year ago
  5. Australopithecus Group Title
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    Check alternative forms to see if your answer is correct https://www.wolframalpha.com/input/?i=%28x^3+%2B+13x^2+-+12x+-+8%29+%2F+%28x+%2B+2%29

    • one year ago
  6. Australopithecus Group Title
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    what ever remainder you have left you have to keep it divided by x + 2

    • one year ago
  7. Firejay5 Group Title
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    I know how to do it, it's just I don't know if I put it over x + 2 ----> \[\frac{ x + 2 }{ -72 }\]

    • one year ago
  8. .Sam. Group Title
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    What do you have for your long division?

    • one year ago
  9. Australopithecus Group Title
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    x+2 remains in the denominator and it should be 60

    • one year ago
  10. Australopithecus Group Title
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    I'm pretty sure based on wolfram alphas answer

    • one year ago
  11. Firejay5 Group Title
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    @.Sam. so far

    • one year ago
  12. .Sam. Group Title
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    The answer goes with|dw:1351049782957:dw|

    • one year ago
  13. Firejay5 Group Title
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    I know that; it's just I need help with where the -72 goes and @Australopithecus it's not 60

    • one year ago
  14. .Sam. Group Title
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    @Firejay5 the remainder is 60

    • one year ago
  15. Firejay5 Group Title
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    No it's not it's -72 I did my work

    • one year ago
  16. .Sam. Group Title
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    Try check your work with this,

    • one year ago
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  17. Firejay5 Group Title
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    It's -76

    • one year ago
  18. Firejay5 Group Title
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    when you subtract; it's like you're distributing - into the second equation http://assets.openstudy.com/updates/attachments/50875f3ae4b058e80cf64652-.sam.-1351050109514-2.png

    • one year ago
  19. Firejay5 Group Title
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    Like when you are subtracting 11x^2 - 12x - (11x^2 + 22x)

    • one year ago
  20. Firejay5 Group Title
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    you are are trying to cancel and get rid of the 11x^2

    • one year ago
  21. .Sam. Group Title
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    yes, then you get -34 x

    • one year ago
  22. Firejay5 Group Title
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    It should be -34x - 8 - (34x + 68)

    • one year ago
  23. .Sam. Group Title
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    -34 x 2 = -68

    • one year ago
  24. .Sam. Group Title
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    its not +68 but its -68

    • one year ago
  25. Firejay5 Group Title
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    what's -8 - 68

    • one year ago
  26. .Sam. Group Title
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    You should be careful there, its actually -8-(-68)

    • one year ago
  27. Firejay5 Group Title
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    Are you getting confused??? @.Sam.

    • one year ago
  28. .Sam. Group Title
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    don't memorize the facts, just remember that it is top minus the bottom, you look back the previous steps, all you do is to subtract the top one with the bottom one, the steps that I gave you is computer generated, its completely true.

    • one year ago
  29. Firejay5 Group Title
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    you have to apply the negative -(34x + 68) to all number s in parentheses

    • one year ago
  30. Australopithecus Group Title
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    a remainder is just part of the equation that you cannot divide, so it is left with the denominator so in your case 60/(x+2)

    • one year ago
  31. .Sam. Group Title
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    The actual answer is 60, why are you ignoring it? Take a look at the picture below.

    • one year ago
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  32. Australopithecus Group Title
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    I'm basing my 60/(x+2) on the wolfram alpha simplification

    • one year ago
  33. Firejay5 Group Title
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    It's not -34x - 68 it's -(34x + 68) the minus/negative in front of the parentheses goes with everything in it

    • one year ago
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