document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=67039>Question 67039</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help. I'm having trouble with this.<BR>\n" );
document.write( "Is(&#8730;x)^2=x  an identity (true for all nonnegative values of x)? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #47675 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=47675\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Is(&#8730;x)^2=x an identity (true for all nonnegative values of x)?<BR>\n" );
document.write( "---------<BR>\n" );
document.write( "Examples don't prove anything but they help to understand.<BR>\n" );
document.write( "If x is nonnegative like 8,<BR>\n" );
document.write( "[sqrt(8)]^2= [2sqrt2]^2=8<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "If x is negative like -8<BR>\n" );
document.write( "[sqrt(-8)]^2 = [2isqrt2]^2=[(i^2)8]=-8<BR>\n" );
document.write( "------------------<BR>\n" );
document.write( "What do you think?<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );