document.write( "Question 1188645: add (5m²n+3mn-6mn²) to the difference of (7m²n-2mn²) and (-m²n+9mn²) \n" ); document.write( "
Algebra.Com's Answer #819779 by MathLover1(20849)\"\" \"About 
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\n" ); document.write( "the difference of \"%287m%5E2n-2mn%5E2%29+\"and \"%28-m%5E2n%2B9mn%5E2%29\" is\r
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\n" ); document.write( "\n" ); document.write( "add (\"5m%5E2n%2B3mn-6mn%5E2\") to it\r
\n" ); document.write( "\n" ); document.write( "\"8m%5E2n+-+11mn%5E2%2B5m%5E2n%2B3mn-6mn%5E2\"\r
\n" ); document.write( "\n" ); document.write( "=\"13m%5E2n+-+17mn%5E2+%2B+3mn\"\r
\n" ); document.write( "\n" ); document.write( "so,
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