
\n" );
document.write( "\r\n" );
document.write( "To do this one we need the identity \r\n" );
document.write( "
and its rearranged version
\r\n" );
document.write( "\r\n" );
document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "Factor common factor
out of the left side\r\n" );
document.write( "\r\n" );
document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "Replace the first factor on the left,
, by
\r\n" );
document.write( "\r\n" );
document.write( "Replace the second factor on the left,
by
\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "Multiply the left side out:\r\n" );
document.write( "\r\n" );
document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "Reverse the terms on the left\r\n" );
document.write( "\r\n" );
document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "Edwin
\n" );
document.write( " \n" );
document.write( "