document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=465660>Question 465660</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Simplify by removing factors of 1.<BR>\n" );
document.write( "21w^2-189<BR>\n" );
document.write( "________<BR>\n" );
document.write( "49w^2-441 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #319091 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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/cgi-bin/show-face.mpl?user=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=319091\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2821w%5E2-189%29%2F%2849w%5E2-441%29 ALIGN=MIDDLE  ALT=\"%2821w%5E2-189%29%2F%2849w%5E2-441%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "= <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=21%28w%5E2+-+9%29%2F%2849%28w%5E2-9%29%29 ALIGN=MIDDLE  ALT=\"21%28w%5E2+-+9%29%2F%2849%28w%5E2-9%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "= 21/49<BR>\n" );
document.write( "= 3/7<BR>\n" );
document.write( "----------<BR>\n" );
document.write( "Note that w cannot be 3 or -3.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );