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swissgirl Group Title

How wld u find \( (a+2b)^4 \)

  • 2 years ago
  • 2 years ago

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  1. swissgirl Group Title
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    The 2b is throwing me off here

    • 2 years ago
  2. panlac01 Group Title
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    how so?

    • 2 years ago
  3. campbell_st Group Title
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    what are you asked to do... expand...

    • 2 years ago
  4. sami-21 Group Title
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    you want to expand it?

    • 2 years ago
  5. swissgirl Group Title
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    ya using binomail theorem

    • 2 years ago
  6. dpflan Group Title
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    you can just substitute another variable for 2b and plug 2b into the final expansion: \[(a+c)^{4}\] where c = 2b

    • 2 years ago
  7. swissgirl Group Title
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    ya ok thanks

    • 2 years ago
  8. campbell_st Group Title
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    the coefficients will be 1 4 6 4 1 so its 1a^4 + 4a^3(2b) + 6a^2(2b)^2 + 4a(2b)^3 + (2b)^4

    • 2 years ago
  9. panlac01 Group Title
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    http://www.purplemath.com/modules/binomial.htm great stuff

    • 2 years ago
  10. swissgirl Group Title
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    oh yay. I like that link

    • 2 years ago
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