document.write( "Question 350085: suppose A is a 2 x 2 matrix as follows\r
\n" ); document.write( "\n" ); document.write( "A = [56
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\n" ); document.write( "\n" ); document.write( "how do i decide whether A is invertible? and if it is find A^-1
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Algebra.Com's Answer #250204 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
A 2x2 matrix needs 4 elements.
\n" ); document.write( "You only have 2 elements.
\n" ); document.write( "Please repost.
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