document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=909081>Question 909081</A>: <I><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=16%283a%2Bm%29%5E2+-25x%5E2+%2B100xy+-100y%5E2 ALIGN=MIDDLE  ALT=\"16%283a%2Bm%29%5E2+-25x%5E2+%2B100xy+-100y%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "How would I factor this?\r<BR>\n" );
document.write( "\n" );
document.write( "My attempt:\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=16%283a%2Bm%29%5E2+-+%285x-10y%29%5E2 ALIGN=MIDDLE  ALT=\"16%283a%2Bm%29%5E2+-+%285x-10y%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%284%283a%2BM%29%2B5x-10y%29%284%283a%2BM%29-5x-10y%29 ALIGN=MIDDLE  ALT=\"%284%283a%2BM%29%2B5x-10y%29%284%283a%2BM%29-5x-10y%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2812a%2B4m%2B5x-10y%29%2812a%2B4m-5x-10y%29 ALIGN=MIDDLE  ALT=\"%2812a%2B4m%2B5x-10y%29%2812a%2B4m-5x-10y%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #551563 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=551563\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You made an error. When you went from <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=16%283a%2Bm%29%5E2+-+%285x-10y%29%5E2 ALIGN=MIDDLE  ALT=\"16%283a%2Bm%29%5E2+-+%285x-10y%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > to <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%284%283a%2Bm%29%2B5x-10y%29%284%283a%2Bm%29-5x-10y%29 ALIGN=MIDDLE  ALT=\"%284%283a%2Bm%29%2B5x-10y%29%284%283a%2Bm%29-5x-10y%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > you made a mistake.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "It *should* be this\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=16%283a%2Bm%29%5E2+-+%285x-10y%29%5E2 ALIGN=MIDDLE  ALT=\"16%283a%2Bm%29%5E2+-+%285x-10y%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%284%283a%2Bm%29+%2B+%285x-10y%29%29%284%283a%2Bm%29+-+%285x-10y%29%29 ALIGN=MIDDLE  ALT=\"%284%283a%2Bm%29+%2B+%285x-10y%29%29%284%283a%2Bm%29+-+%285x-10y%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%284%283a%2Bm%29+%2B+5x-10y%29%284%283a%2Bm%29+-+5x%2B10y%29 ALIGN=MIDDLE  ALT=\"%284%283a%2Bm%29+%2B+5x-10y%29%284%283a%2Bm%29+-+5x%2B10y%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "notice on the last line I have -5x+10y (whereas you have -5x-10y). So it was a case of you not distributing the negative through fully.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "I'll let you finish up. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );