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Homework Help: Expand and simplify

  1. Mar 24, 2008 #1
    I have done this question multiple times and come up with a different answer each time.

    Q. 1.) Expand and simplify

    So far I've gotten

    = -72x +1
    = 1 - 72x

    And some others. Any help would be great.
  2. jcsd
  3. Mar 24, 2008 #2


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    Staff Emeritus
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    Gold Member

    Please show us your work, for example, what did you get for the expansion of each term?
  4. Mar 24, 2008 #3
    okay. I end up with 10x^2 - 22x +41- 10x^2-10x-40x-40 taking everything out of the brackets.
  5. Mar 24, 2008 #4
    That -22x is probably the result of the x terms in (3x-5)^2+(x-4)^2 but you made a sign error.
    there is also a sign error in -10x-40x and in -40
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