document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=37077>Question 37077</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0321279085/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Is (&#8730;x)^2=x an identity (true for all values of x)? Please explain </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #22788 by </B><A HREF=/tutors/aboutme.mpl?userid=jcmtnez><B>jcmtnez(53)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jcmtnez><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=22788\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Sorry but I don't think so. The formula  (&#8730;x)^2=x is at least an identy for all positive values, in which x is greater or equal to zero. If you only use integers the formula is an identity only for positive value, but for all natural numbers, if you use also negative value the formula will be an identity using complex numbers. It depends on the domain and range that you choose, real or complex numbers.\r<BR>\n" );
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