document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=133358>Question 133358</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help!  I don't even know where to start.<BR>\n" );
document.write( "divide (x^2-9y^2/7x^2-21y)/(x^2+3xy)\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #97545 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=97545\">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=%28%28x%5E2-9%2Ay%5E2%29%2F%287%2Ax%5E2-21%2Ay%29%29%2F%28x%5E2%2B3%2Ax%2Ay%29 ALIGN=MIDDLE  ALT=\"%28%28x%5E2-9%2Ay%5E2%29%2F%287%2Ax%5E2-21%2Ay%29%29%2F%28x%5E2%2B3%2Ax%2Ay%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > Start with the given expression\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%28x%5E2-9%2Ay%5E2%29%2F%287%2Ax%5E2-21%2Ay%29%29%2A%281%2F%28x%5E2%2B3%2Ax%2Ay%29%29 ALIGN=MIDDLE  ALT=\"%28%28x%5E2-9%2Ay%5E2%29%2F%287%2Ax%5E2-21%2Ay%29%29%2A%281%2F%28x%5E2%2B3%2Ax%2Ay%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > Multiply the first fraction by the reciprocal of the second fraction\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x%5E2-9%2Ay%5E2%29%2F%28%287%2Ax%5E2-21%2Ay%29%2A%28x%5E2%2B3%2Ax%2Ay%29%29 ALIGN=MIDDLE  ALT=\"%28x%5E2-9%2Ay%5E2%29%2F%28%287%2Ax%5E2-21%2Ay%29%2A%28x%5E2%2B3%2Ax%2Ay%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > Combine the fractions\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%28x%2B3y%29%28x-3y%29%29%2F%28%287%2Ax%5E2-21%2Ay%29%2A%28x%5E2%2B3%2Ax%2Ay%29%29 ALIGN=MIDDLE  ALT=\"%28%28x%2B3y%29%28x-3y%29%29%2F%28%287%2Ax%5E2-21%2Ay%29%2A%28x%5E2%2B3%2Ax%2Ay%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > Factor <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2-9%2Ay%5E2 ALIGN=MIDDLE  ALT=\"x%5E2-9%2Ay%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > to get <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x%2B3y%29%28x-3y%29 ALIGN=MIDDLE  ALT=\"%28x%2B3y%29%28x-3y%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=%28%28x%2B3y%29%28x-3y%29%29%2F%287%28x%5E2-3y%29%2A%28x%5E2%2B3%2Ax%2Ay%29%29 ALIGN=MIDDLE  ALT=\"%28%28x%2B3y%29%28x-3y%29%29%2F%287%28x%5E2-3y%29%2A%28x%5E2%2B3%2Ax%2Ay%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > Factor out the GCF 7 from <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7%2Ax%5E2-21%2Ay ALIGN=MIDDLE  ALT=\"7%2Ax%5E2-21%2Ay\"   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=%28%28x%2B3y%29%28x-3y%29%29%2F%287x%28x%5E2-3y%29%2A%28x%2B3y%29%29 ALIGN=MIDDLE  ALT=\"%28%28x%2B3y%29%28x-3y%29%29%2F%287x%28x%5E2-3y%29%2A%28x%2B3y%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > Factor out the GCF x from <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2%2B3%2Ax%2Ay ALIGN=MIDDLE  ALT=\"x%5E2%2B3%2Ax%2Ay\"   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=%28cross%28%28x%2B3y%29%29%28x-3y%29%29%2F%287x%28x%5E2-3y%29%2Across%28%28x%2B3y%29%29%29 ALIGN=MIDDLE  ALT=\"%28cross%28%28x%2B3y%29%29%28x-3y%29%29%2F%287x%28x%5E2-3y%29%2Across%28%28x%2B3y%29%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > Cancel like terms\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x-3y%29%2F%287x%28x%5E2-3y%29%29 ALIGN=MIDDLE  ALT=\"%28x-3y%29%2F%287x%28x%5E2-3y%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > Simplify\r<BR>\n" );
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document.write( "Answer:\r<BR>\n" );
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document.write( "So <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%28x%5E2-9%2Ay%5E2%29%2F%287%2Ax%5E2-21%2Ay%29%29%2F%28x%5E2%2B3%2Ax%2Ay%29 ALIGN=MIDDLE  ALT=\"%28%28x%5E2-9%2Ay%5E2%29%2F%287%2Ax%5E2-21%2Ay%29%29%2F%28x%5E2%2B3%2Ax%2Ay%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > simplifies to <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x-3y%29%2F%287x%28x%5E2-3y%29%29 ALIGN=MIDDLE  ALT=\"%28x-3y%29%2F%287x%28x%5E2-3y%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > \r<BR>\n" );
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