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evergirl Group Title

please help

  • one year ago
  • one year ago

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  1. evergirl Group Title
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    • one year ago
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  2. DrakeAndHisMind Group Title
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    54

    • one year ago
  3. evergirl Group Title
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    how did u do that though?

    • one year ago
  4. DrakeAndHisMind Group Title
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    foiling

    • one year ago
  5. DrakeAndHisMind Group Title
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    http://en.wikipedia.org/wiki/FOIL_method

    • one year ago
  6. tcarroll010 Group Title
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    (a + b)(a - b) is the form of your expression. You have to multiply that out: a(a - b) + b(a - b) = a^2 - ab + ab - b^2 = a^2 - b^2

    • one year ago
  7. evergirl Group Title
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    thanks

    • one year ago
  8. tcarroll010 Group Title
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    In this case, a is 8 and b is sqrt(10)

    • one year ago
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spraguer (Moderator)
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is replying to Can someone tell me what button the professor is hitting...

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