document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=937687>Question 937687</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Check if the matrices mutually inverse ( 15  3.1)/( 10   2 )and(-2  2)/(10 -300/31)<BR>\n" );
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document.write( "I need a solution and explanation<BR>\n" );
document.write( "what does it mean mutually inverse? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #571086 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=571086\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let I be the identity matrix (n by n), then<BR>\n" );
document.write( "two n by n matrices are mutually inverse when<BR>\n" );
document.write( "A1A2 = I and<BR>\n" );
document.write( "A2A1 = I<BR>\n" );
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