document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=164485>Question 164485</A>: <I><SPAN STYLE=\"word-break: break-all;\"> what is the domain of p(x)=X2+1 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #121227 by </B><A HREF=/tutors/aboutme.mpl?userid=themathprof><B>themathprof(21)</B></A><img src=\"/images/stars/stars-07.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=themathprof><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=121227\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> p(x)=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2-1 ALIGN=MIDDLE  ALT=\"x%5E2-1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The domain is the set of all possible x-values.<BR>\n" );
document.write( "Sometimes there are restrictions on x. Example:<BR>\n" );
document.write( "p(x)=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28x%29 ALIGN=MIDDLE  ALT=\"sqrt%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "where x can NOT be negative. So the domain would<BR>\n" );
document.write( "be restricted to all non-negative numbers (x>=0)\r<BR>\n" );
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document.write( "sometimes x is in the denominator:  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%286%29%2F%28x-3%29 ALIGN=MIDDLE  ALT=\"%286%29%2F%28x-3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "since the denominator can NOT be zero, here x can NOT be 3<BR>\n" );
document.write( "because x=3 would make the denominator = 0\r<BR>\n" );
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document.write( "But in your problem, x is neither under a radical nor in<BR>\n" );
document.write( "the denominator.\r<BR>\n" );
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document.write( "So,............ there are NO restrictions on x and we say that<BR>\n" );
document.write( "the domain is the set of all REAL numbers.\r<BR>\n" );
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document.write( "Find more domain problems, and word problems<BR>\n" );
document.write( "explained step by step in my free software: Math911<BR>\n" );
document.write( "Download and activate free from www.math911.com<BR>\n" );
document.write( "Please tell your friends (and your teacher!)\r<BR>\n" );
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document.write( "Professor Martin Weissman </SPAN>\n" );
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