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Homework Help: Inverse matrix

  1. May 12, 2008 #1
    Can someone please show me how to get this.

    http://users.on.net/~rohanlal/Untitled-3.jpg [Broken]

    I get the same answer but the sign of everything is the opposite.
    Last edited by a moderator: May 3, 2017
  2. jcsd
  3. May 12, 2008 #2


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    What is the formula to find inverse of a 2x2 matrix?
  4. May 12, 2008 #3
    Inverse of A = [a b; c d] =>

    (1/ad-bc) [ d -b; -c a]


  5. May 12, 2008 #4


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    How the heck can we show you what you did wrong if you don't show us what you did?? Huh? Nobody is allowed to simply work it out for you. You should know that.
    Last edited by a moderator: May 3, 2017
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