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Matrix algebra - matrix equation

  1. Oct 8, 2006 #1
    A=(5, 4) I (1, 0)
    (4,6) (0,1)

    Those are matrix by the way.

    How do I show A^2=11A-18I? I know i'm overlooking something, but i don't know what. Any tips would be helpful
     
  2. jcsd
  3. Oct 8, 2006 #2
    ah im sorry, I meant to put this in the question section, please move!
     
  4. Oct 8, 2006 #3

    radou

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  5. Oct 8, 2006 #4

    matt grime

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    Let me ask you this.

    Let x=3. How do you show that x^2=2x+3?
     
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