document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=377947>Question 377947</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Simplify by factoring: square root x^18\r<BR>\n" );
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document.write( "I think the answer is x^9 but I am only half sure!\r<BR>\n" );
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document.write( "THANKS!! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #268645 by </B><A HREF=/tutors/aboutme.mpl?userid=jsmallt9><B>jsmallt9(3758)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jsmallt9><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=268645\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You are very close. The only problem is that square roots are supposed to be positive (or zero). <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E9 ALIGN=MIDDLE  ALT=\"x%5E9\"   DISABLED_style= \"max-width:90%; height:auto;\" > could be negative if x is negative. And we have no reason to say that x cannot be negative. So we have to do something to ensure that our answer is positive (or zero).<br><BR>\n" );
document.write( "Absolute value comes to the rescue:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28x%5E18%29+=+abs%28x%5E9%29 ALIGN=MIDDLE  ALT=\"sqrt%28x%5E18%29+=+abs%28x%5E9%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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