document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=37413>Question 37413</A>: <I><SPAN STYLE=\"word-break: break-all;\"> what is an extraneous root? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #23067 by </B><A HREF=/tutors/aboutme.mpl?userid=fractalier><B>fractalier(6550)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fractalier><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/cgi-bin/show-face.mpl?user=fractalier><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=23067\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Sometimes you solve an equation and get two answers.  By plugging them in to the original equation to check, you discover one (or both) do not work.  That is an example of an extraneous root.  Very common in rational expressions/equations, and equations containing radicals. </SPAN>\n" );
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