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Christos Group Title

Can you teach me how to do long division?

  • one year ago
  • one year ago

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  1. Luigi0210 Group Title
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    Any specific examples..?

    • one year ago
  2. smokeydabear Group Title
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    I can teach you my more kid-friendly approach to long division, if that's okay with you.

    • one year ago
  3. Christos Group Title
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    2x^3-3x^2-36x+5

    • one year ago
  4. smokeydabear Group Title
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    Oh that sort of long division... Yeah I always forget that. Luigi, I summon thee!

    • one year ago
  5. Luigi0210 Group Title
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    What are you dividing it by?

    • one year ago
  6. Christos Group Title
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    diving by x - 5

    • one year ago
  7. Luigi0210 Group Title
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    There's an easier way. Have you learned synthetic division?

    • one year ago
  8. Christos Group Title
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    No can you teach me please

    • one year ago
  9. Luigi0210 Group Title
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    Synthetic division is like upside down division. So for the problem \[\frac{ 2x^3-3x^2-36x+5 }{ x-5 }\] It would look like this: |dw:1368504397441:dw|

    • one year ago
  10. Christos Group Title
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    the result is 2x^3+7x-1 ?

    • one year ago
  11. Luigi0210 Group Title
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    no 2x^2

    • one year ago
  12. Christos Group Title
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    can you explain to me how you got those numbers at your image

    • one year ago
  13. Christos Group Title
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    These ones http://screencast.com/t/lqjFKcJA

    • one year ago
  14. Luigi0210 Group Title
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    For synthetic division first what you do is solve for x: x-5=0 x=5 -------------------------------------------------- Now just take the coefficients of the equation and plug them in. When it is set up you then drop the first number, like in the example we dropped the 2. Next we would multiply it by 5 and add it to the next coefficient and then repeat. So 5*2 is 10. and -3+10 is 7.and 7*5 is 35. 35+-36 which is -1. and -1*5 is -5 and so on

    • one year ago
  15. Christos Group Title
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    thank you

    • one year ago
  16. Luigi0210 Group Title
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    Synthetic division only works with linear equations.

    • one year ago
  17. Christos Group Title
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    what do you mean by "linear" ?

    • one year ago
  18. Christos Group Title
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    @Luigi0210

    • one year ago
  19. Luigi0210 Group Title
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    Like you can't use this method if you're dividing by like x^2 and beyond. It only works with x+5, x-2, 5x+9, etc.

    • one year ago
  20. Christos Group Title
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    I see :)

    • one year ago
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