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Homework Help: Linear algebra matrices multiplication (transpose)

  1. Oct 5, 2011 #1
    1. The problem statement, all variables and given/known data

    We are looking for the matrix A

    2. Relevant equations

    (A^transpose)^transpose=A

    3. The attempt at a solution

    i would start with finding the transpose of the matrix.

    -5 0
    -8 -7
     

    Attached Files:

  2. jcsd
  3. Oct 6, 2011 #2

    Mark44

    Staff: Mentor

    OK, so
    [tex]((2A - I)^T)^T = \begin{bmatrix}-5&0\\-8&-7\end{bmatrix}[/tex]

    Now what? Use your relevant equation to simplify the left side.
     
  4. Oct 6, 2011 #3
    S0 + identity matrix on left side... =

    [-4 0] ... then /2= [-2 0]
    -8 -6 ...................-4 -3

    GOT IT!
     
    Last edited: Oct 6, 2011
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