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swissgirl

  • 3 years ago

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

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  1. swissgirl
    • 3 years ago
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    The 2b is throwing me off here

  2. panlac01
    • 3 years ago
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    how so?

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

  4. sami-21
    • 3 years ago
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    you want to expand it?

  5. swissgirl
    • 3 years ago
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    ya using binomail theorem

  6. dpflan
    • 3 years ago
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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

  7. swissgirl
    • 3 years ago
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    ya ok thanks

  8. campbell_st
    • 3 years ago
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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

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

  10. swissgirl
    • 3 years ago
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    oh yay. I like that link

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