SOLUTION: Trying to help my daughter...I do not understand what they mean by take the inverse...I know how to set up the matrix

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Question 153838This question is from textbook algebra 2
: Trying to help my daughter...I do not understand what they mean by take the inverse...I know how to set up the matrix This question is from textbook algebra 2

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
the inverse of a matrix [A] is the matrix [B] that gives the identity matrix [I]
as a result of multiplication

[A][B]=[I]

I would suggest google and/or wikipedia as a source of information on this

the Gauss-Jordan method seems the most straight forward