document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=521177>Question 521177</A>: <I><SPAN STYLE=\"word-break: break-all;\"> factor 9x^4-81y^2 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #346365 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=346365\">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=9x%5E4-81y%5E2 ALIGN=MIDDLE  ALT=\"9x%5E4-81y%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9%28x%5E4-9y%5E2%29 ALIGN=MIDDLE  ALT=\"9%28x%5E4-9y%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9%28%28x%5E2%29%5E2-%283y%29%5E2%29 ALIGN=MIDDLE  ALT=\"9%28%28x%5E2%29%5E2-%283y%29%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9%28x%5E2-3y%29%28x%5E2%2B3y%29 ALIGN=MIDDLE  ALT=\"9%28x%5E2-3y%29%28x%5E2%2B3y%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > Use the difference of squares factoring formula here.\r<BR>\n" );
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document.write( "So <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9x%5E4-81y%5E2 ALIGN=MIDDLE  ALT=\"9x%5E4-81y%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > factors to <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9%28x%5E2-3y%29%28x%5E2%2B3y%29 ALIGN=MIDDLE  ALT=\"9%28x%5E2-3y%29%28x%5E2%2B3y%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > \r<BR>\n" );
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document.write( "In other words, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9x%5E4-81y%5E2=9%28x%5E2-3y%29%28x%5E2%2B3y%29 ALIGN=MIDDLE  ALT=\"9x%5E4-81y%5E2=9%28x%5E2-3y%29%28x%5E2%2B3y%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > \r<BR>\n" );
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document.write( "If you need more help, email me at <a  rel=nofollow HREF=\"mailto:jim_thompson5910@hotmail.com\">jim_thompson5910@hotmail.com</a>\r<BR>\n" );
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document.write( "Jim\r<BR>\n" );
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