document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=303138>Question 303138</A>: <I><SPAN STYLE=\"word-break: break-all;\"> square root of (-4) x square root of (-4) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #217305 by </B><A HREF=/tutors/aboutme.mpl?userid=CharlesG2><B>CharlesG2(834)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=CharlesG2><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=217305\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> square root of (-4) x square root of (-4)\r<BR>\n" );
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document.write( "square root of -1 is i<BR>\n" );
document.write( "square root of 4 is +- 2<BR>\n" );
document.write( "so square root of -4 is +- 2i<BR>\n" );
document.write( "3 possibilites: 1. take + root times + root and get - answer<BR>\n" );
document.write( "                2. - root times - root and get - answer (same answer as 1.)<BR>\n" );
document.write( "                3. + root times - root or vice versa and get + answer<BR>\n" );
document.write( "(the i^2 flips the sign)<BR>\n" );
document.write( "so 2 answers: 1. 2i * 2i = -2i * -2i = 4i^2 = 4 * -1 = -4<BR>\n" );
document.write( "              2. 2i * -2i = -2i * 2i = -4i^2 = -4 * -1 = 4\r<BR>\n" );
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document.write( "                <BR>\n" );
document.write( "                 </SPAN>\n" );
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