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anonymous

  • 4 years ago

Divide 3x2 – 11x – 4 by x – 4.

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  1. anonymous
    • 4 years ago
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    divide 3x^2-11x-4 by x-4

  2. anonymous
    • 4 years ago
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    start with \[3x^2-11x+4=(x-4)(3x+1)\]and then cancel

  3. anonymous
    • 4 years ago
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    so i should foil the problem first?

  4. anonymous
    • 4 years ago
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    no no you want to factor first!

  5. anonymous
    • 4 years ago
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    this lesson has nothing to do with factoring, so i dont know if doing that would work

  6. anonymous
    • 4 years ago
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    \[\frac{3x^2 – 11x – 4}{x – 4}=\frac{(x-4)(3x+1)}{x-4}=3x+1\]

  7. anonymous
    • 4 years ago
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    besides dividing, factoring also works?

  8. anonymous
    • 4 years ago
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    yes, in this case you can factor and cancel, but not in every case. sometimes you get a remainder

  9. anonymous
    • 4 years ago
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    can you give me an example of where you cant use this method?

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spraguer (Moderator)
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