document.write( "Question 612894: Factor this expression completely. Note: Place factors alphabetically in the grid!\r
\n" ); document.write( "\n" ); document.write( "mn - 4m - 5n + 20
\n" ); document.write( "
\n" ); document.write( "

Algebra.Com's Answer #385769 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
mn - 4m - 5n + 20\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "(mn - 4m) + (-5n + 20)\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "m(n - 4) + (-5n + 20)\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "m(n - 4) - 5(n - 4)\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "(m - 5)(n - 4)\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "So mn - 4m - 5n + 20 completely factors to (m - 5)(n - 4)
\n" ); document.write( "
\n" );