document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=30168>Question 30168</A>: <I><SPAN STYLE=\"word-break: break-all;\"> These are square roots, but I can't put the symbol.\r<BR>\n" );
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document.write( "Evaluate, if possible.\r<BR>\n" );
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document.write( "-121 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #16857 by </B><A HREF=/tutors/aboutme.mpl?userid=askmemath><B>askmemath(368)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=askmemath><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=16857\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Do you know about Imaginary Numbers?<BR>\n" );
document.write( "We know that the square of a number is always Positive.<BR>\n" );
document.write( "What if there exists such a number whose square is always Negative? Such a number is called Imaginary Number and is denoted by the letter \"i\"<BR>\n" );
document.write( "So <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=i%2Ai+=+i%5E2+=+-1 ALIGN=MIDDLE  ALT=\"i%2Ai+=+i%5E2+=+-1\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "So <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-121+=+121i%5E2 ALIGN=MIDDLE  ALT=\"-121+=+121i%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28121i%5E2%29 ALIGN=MIDDLE  ALT=\"sqrt%28121i%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "121 = 11*11<BR>\n" );
document.write( "So your final answer = 11i </SPAN>\n" );
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