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anonymous

  • 5 years ago

5(2+h)^3

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  1. anonymous
    • 5 years ago
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    Do you need to expand brackets?

  2. amistre64
    • 5 years ago
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    5(2+h)(2+h)(2+h)

  3. anonymous
    • 5 years ago
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    Yes clearly but I do not see what the question is getting at.

  4. amistre64
    • 5 years ago
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    its not a question so much as a chance to read minds lol

  5. anonymous
    • 5 years ago
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    True :)

  6. anonymous
    • 5 years ago
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    amistre is a mind reader for sure

  7. amistre64
    • 5 years ago
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    its openstudy jeopardy; you get an answer and have to form the question ;)

  8. anonymous
    • 5 years ago
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    that probability question took it out of me.

  9. amistre64
    • 5 years ago
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    2+h * 2+h ----- 4 +2h +2h+h^2 ----------- 4 +4h +h^2 * 2+h ------------ 8 +8h +2h^2 +4h +4h^2 +h^3 ----------------- 8 +12h +6h^2 +h^3 * 5 ------------------- 40 +60h +30h^2 +5h^3

  10. anonymous
    • 5 years ago
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    \[(a+b)^3=a^3+3a^2b+3ab^2+b^3\] is useful in this context

  11. anonymous
    • 5 years ago
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    put \[a=2,b=h\]and out it pops

  12. anonymous
    • 5 years ago
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    POP!

  13. amistre64
    • 5 years ago
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    useful if you like to memorize formulas; but not so good if you need to know why the formula works.

  14. anonymous
    • 5 years ago
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    actually i think it is very useful to know \[(a+b)^n\] unless you want to do zillions of multiplication reinventing the wheel at every step

  15. amistre64
    • 5 years ago
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    after doing alot of these equations you notice a pattern that forms; and that pattern matches the formula. You can derive the formula as well by simply using the variables instead of the numbers...

  16. anonymous
    • 5 years ago
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    i guess you could say it is a 'formula' but it is certainly a useful one to know.

  17. anonymous
    • 5 years ago
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    like memorizing 8*7=56

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