anonymous
  • anonymous
Divide 3x2 – 11x – 4 by x – 4.
Mathematics
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
divide 3x^2-11x-4 by x-4
anonymous
  • anonymous
start with \[3x^2-11x+4=(x-4)(3x+1)\]and then cancel
anonymous
  • anonymous
so i should foil the problem first?

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anonymous
  • anonymous
no no you want to factor first!
anonymous
  • anonymous
this lesson has nothing to do with factoring, so i dont know if doing that would work
anonymous
  • anonymous
\[\frac{3x^2 – 11x – 4}{x – 4}=\frac{(x-4)(3x+1)}{x-4}=3x+1\]
anonymous
  • anonymous
besides dividing, factoring also works?
anonymous
  • anonymous
yes, in this case you can factor and cancel, but not in every case. sometimes you get a remainder
anonymous
  • anonymous
can you give me an example of where you cant use this method?

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