document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=299376>Question 299376</A>: <I><SPAN STYLE=\"word-break: break-all;\"> reverse foil or grouping<BR>\n" );
document.write( "16x^4-81 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #215126 by </B><A HREF=/tutors/aboutme.mpl?userid=oberobic><B>oberobic(2304)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=oberobic><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=215126\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 16x^4-81<BR>\n" );
document.write( "You can start with...<BR>\n" );
document.write( "(4x^2 +9)(4x^2 -9)<BR>\n" );
document.write( "And keep going...<BR>\n" );
document.write( "(4x^2+9)*(2x+3)(2x-3) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );