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Cutiepo0 Group Title

Expand and simplify the first 3 terms of the binomal power: (3y+5)^9 PLEASE HELP!!

  • 2 years ago
  • 2 years ago

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  1. mathteacher1729 Group Title
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    Do you know the binomial theorem? It lets you find the nth term of insane expressions like this. :)

    • 2 years ago
  2. Cutiepo0 Group Title
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    I know usually how to solve using the pascal's triangle, but I don't know how to do it for just the first 3 terms

    • 2 years ago
  3. mathteacher1729 Group Title
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    http://regentsprep.org/Regents/math/algtrig/ATP4/bintheorem.htm might be useful.

    • 2 years ago
  4. mathteacher1729 Group Title
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    Check out the examples. Then substitute your numbers in and see what happens. NOTE -- you will get BIG NUMBERS.

    • 2 years ago
  5. Cutiepo0 Group Title
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    Okay, that was useful, but we're not supposed to be using the formula for this question. Do you know if there's any way to solve it just using pascal's triangle?

    • 2 years ago
  6. mathteacher1729 Group Title
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    You'd have to expand out to the 9th row! Have fun with that! Fortunately you can do it in excel. :) http://jwilson.coe.uga.edu/EMAT6680/Parsons/MVP6690/Essay1/excel.html

    • 2 years ago
  7. Zarkon Group Title
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    use the binomial coefficients \[{n\choose r}=\frac{n!}{r!(n-r)!}\]

    • 2 years ago
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