Results 1 to 3 of 3

Math Help - Is my Math Textbook wrong on this Integer Problem or is it just me?

  1. #1
    Newbie medlinemd's Avatar
    Joined
    Apr 2012
    From
    Houston
    Posts
    10

    Is my Math Textbook wrong on this Integer Problem or is it just me?

    Can you guys help me with this problem with a little explanation on how you came to solve it and I will share the answer that was provided in the book. Thanks in Advance
    Is my Math Textbook wrong on this Integer Problem or is it just me?-mathh.jpg
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,698
    Thanks
    454

    Re: Is my Math Textbook wrong on this Integer Problem or is it just me?

    note ... -2^2 = -1 \cdot 2^2 = -1 \cdot 4 = -4,

    and ... (-2)^2 = (-1 \cdot 2)^2 = (-1)^2 \cdot 2^2 = 1 \cdot 4 = 4

    therefore ...

    -2^2 - (-2)^2 = -4 - 4 = -8
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie medlinemd's Avatar
    Joined
    Apr 2012
    From
    Houston
    Posts
    10

    Re: Is my Math Textbook wrong on this Integer Problem or is it just me?

    Is my Math Textbook wrong on this Integer Problem or is it just me?-math-answer.jpg

    You got the same answer as the book. I see where I went wrong thank you for answering my question. I thought -2^2 was the same as (-2)^2

    How I did it the first time:
    -2^2-(-2)^2=
    =
    -2^2-4
    =4-4
    = 0

    Last edited by medlinemd; April 12th 2012 at 08:01 PM.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. [SOLVED] am I wrong here or is my textbook wrong??
    Posted in the Algebra Forum
    Replies: 5
    Last Post: September 25th 2011, 05:13 PM
  2. grade 12, applied math textbook
    Posted in the Statistics Forum
    Replies: 0
    Last Post: March 21st 2011, 01:19 AM
  3. Suggestions for a comprehensive discrete math textbook
    Posted in the Discrete Math Forum
    Replies: 2
    Last Post: February 15th 2010, 08:28 AM
  4. [SOLVED] Is my textbook wrong? Series convergence vs divergence.
    Posted in the Differential Geometry Forum
    Replies: 5
    Last Post: September 6th 2009, 06:11 AM
  5. Integration problem: is my textbook wrong?
    Posted in the Calculus Forum
    Replies: 4
    Last Post: May 21st 2006, 06:02 AM

Search Tags


/mathhelpforum @mathhelpforum