\r\n" );
document.write( "factor completely \r\n" );
document.write( "\r\n" );
document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "Write
as
\r\n" );
document.write( "\r\n" );
document.write( "Write
as
\r\n" );
document.write( "\r\n" );
document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "Rule for factoring the difference of two squares:\r\n" );
document.write( "\r\n" );
document.write( "
factors as
\r\n" );
document.write( "\r\n" );
document.write( "Here
and
\r\n" );
document.write( "\r\n" );
document.write( "So answer = \r\n" );
document.write( "\r\n" );
document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "But wait! That's not all! That first factor\r\n" );
document.write( "
is also the difference of two \r\n" );
document.write( "perfect squares, which can be seen if we \r\n" );
document.write( "write the
as
\r\n" );
document.write( "\r\n" );
document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "Then use the same rule again on the first\r\n" );
document.write( "parentheses, this time with
and
\r\n" );
document.write( "\r\n" );
document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "That's the final answer. A word of caution. Do not\r\n" );
document.write( "attempt to factor the last factor
. That\r\n" );
document.write( "is the SUM of two squares, which doesn't factor. Only\r\n" );
document.write( "the DIFFERENCE of two squares can be factored.\r\n" );
document.write( "\r\n" );
document.write( "Edwin
\r
\n" );
document.write( "\n" );
document.write( " \n" );
document.write( "