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Math Help - Use Cramer's rule to find x2

  1. #1
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    Use Cramer's rule to find x2

    Compute the cofactors C_{12}, C_{22}, C_{32} for the matrix A =
    [ 1 2 3 ]
    [ 2 1 3 ]
    [ 1 -1 1]. Use the cremar's rule to find x_2 when Ax = [1 -2 1]^T


    I got the  C_{12} = -5, C_{22} = -4 , C_{32} = -3 , how do I find x_2?
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  2. #2
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    This same problem was posted and answered at http://www.mathhelpforum.com/math-he...2-when-ax.html
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