\r\n" );
document.write( "Put the a² over 11 so that everything on top \r\n" );
document.write( "and bottom will be a fraction. I used 11 instead\r\n" );
document.write( "of just 1 because it \"stacks up\" better using the forum's\r\n" );
document.write( "notation system. You can just use 1 where I have 11.\r\n" );
document.write( "
\r\n" );
document.write( "Look at all the denominators on the top and the bottom.\r\n" );
document.write( "Their LCD is z³. so multiply by 
, written as
\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "·
\r\n" );
document.write( "Now distribute:\r\n" );
document.write( "
\r\n" );
document.write( "In the upper left term you can cancel the z³'s, \r\n" );
document.write( " leaving x²a.\r\n" );
document.write( "The upper right term becomes just -z³a².\r\n" );
document.write( "In the lower left term, subtract the exponents \r\n" );
document.write( " of the z's and get simply zx.\r\n" );
document.write( "In the lower right term you can cancel the z³'s,\r\n" );
document.write( " leaving -3.\r\n" );
document.write( "\r\n" );
document.write( "So you end up with:\r\n" );
document.write( "
\r\n" );
document.write( "Now if you like you can factor out \"a\" on top:\r\n" );
document.write( "
\r\n" );
document.write( "but that step isn't necessary.\r\n" );
document.write( "\r\n" );
document.write( "Edwin
\n" );
document.write( " \n" );
document.write( "![\"\"](\"/images/stars/stars-13.gif\")
