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Christos
Can you teach me how to do long division?
Any specific examples..?
I can teach you my more kid-friendly approach to long division, if that's okay with you.
Oh that sort of long division... Yeah I always forget that. Luigi, I summon thee!
What are you dividing it by?
There's an easier way. Have you learned synthetic division?
No can you teach me please
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|
the result is 2x^3+7x-1 ?
can you explain to me how you got those numbers at your image
These ones http://screencast.com/t/lqjFKcJA
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
Synthetic division only works with linear equations.
what do you mean by "linear" ?
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.