document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=638733>Question 638733</A>: <I><SPAN STYLE=\"word-break: break-all;\">   Simplify the expression.  State the excluded values of the variables\r<BR>\n" );
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document.write( "a^2+16a+63<BR>\n" );
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document.write( "   a+7\r<BR>\n" );
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document.write( "(Sorry that is a fraction above) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #402375 by </B><A HREF=/tutors/aboutme.mpl?userid=fcabanski><B>fcabanski(1391)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fcabanski><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=402375\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> For excluded values look at denominators and square roots.  Values that make the denominator 0 or square roots - are excluded.  In this case a=-7 makes the denominator 0.  So a=-7 is excluded.<P><BR>\n" );
document.write( "Factor the top:  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%5E2%2B16a%2B63+=+%28a%2B7%29%28a%2B9%29 ALIGN=MIDDLE  ALT=\"a%5E2%2B16a%2B63+=+%28a%2B7%29%28a%2B9%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<P><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28a%2B7%29%28a%2B9%29+%2F+%28a%2B7%29+ ALIGN=MIDDLE  ALT=\"%28a%2B7%29%28a%2B9%29+%2F+%28a%2B7%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > The (a+7) terms cancel.  The simplified version is a+9.<BR>\n" );
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