document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=101336>Question 101336</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Fator the following biomial.\r<BR>\n" );
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document.write( "25x^2 - 81y^2.\r<BR>\n" );
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document.write( "I'm not sure how to solve this.  I'm just alittle confused on how to do it.\r<BR>\n" );
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document.write( "Thank you for the help. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #73798 by </B><A HREF=/tutors/aboutme.mpl?userid=Earlsdon><B>Earlsdon(6294)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Earlsdon><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=73798\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Factor:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=25x%5E2-81y%5E2 ALIGN=MIDDLE  ALT=\"25x%5E2-81y%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > Do you see that this binomial is the difference of two squares?<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%285x%29%5E2-%289y%29%5E2 ALIGN=MIDDLE  ALT=\"%285x%29%5E2-%289y%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The difference of two squares can be factored thus:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A%5E2-B%5E2+=+%28A%2BB%29%28A-B%29 ALIGN=MIDDLE  ALT=\"A%5E2-B%5E2+=+%28A%2BB%29%28A-B%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > Applying this to your problem, we get:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=25x%5E2-81y%5E2+=+%285x%29%5E2-%289y%29%5E2 ALIGN=MIDDLE  ALT=\"25x%5E2-81y%5E2+=+%285x%29%5E2-%289y%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%285x%2B9y%29%285x-9y%29 ALIGN=MIDDLE  ALT=\"%285x%2B9y%29%285x-9y%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "You can confirm this by using the FOIL method to multiply the resultant factors:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%285x%2B9y%29%285x-9y%29+=+25x%5E2cross%28-45xy%29%2Bcross%2845xy%29-81y%5E2 ALIGN=MIDDLE  ALT=\"%285x%2B9y%29%285x-9y%29+=+25x%5E2cross%28-45xy%29%2Bcross%2845xy%29-81y%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > The two middle terms drop out to leave you with:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=25x%5E2-81y%5E2 ALIGN=MIDDLE  ALT=\"25x%5E2-81y%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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