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Homework Help: Checking simple algebra

  1. Feb 13, 2006 #1
    Sorry had a long day... just need this checking over please

    (3n+2)(3m+2)(3p+2) = 27nmp + 6(m+n+p) + 8 :zzz:
  2. jcsd
  3. Feb 13, 2006 #2
    Not what I got. Try multiplying the first two terms, then multiplying the result by the third term. There is something missing in the middle.
  4. Feb 13, 2006 #3
    I get this

    27 nmp+18p(m+n)+12p+18nm+12(m+n)+8

    but isn't there a nicer way to simplify it like (3n+2)(3m+2)= 9nm+6(n+m)+4
    which is all neat and tidy?
    Last edited: Feb 13, 2006
  5. Feb 13, 2006 #4
    It's not a particularly tidy problem. I got the same answer you did, but wrote it like this

    27mnp + 18(mn+mp+np) + 12(m+n+m) + 8

    That's about as pretty as it gets.
  6. Feb 13, 2006 #5
    Thanks sunshine! you must have meant 27mnp + 18(mn+mp+np) + 12(m+n+p) + 8 :-)
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