document.write( "Question 836819: if M and N are two matrices such that MN=N and NM=M show that M^2 + N^2= M + N \n" ); document.write( "
Algebra.Com's Answer #504378 by richard1234(7193)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "Similarly, \r
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\n" ); document.write( "\n" ); document.write( "Therefore .
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