document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=171743>Question 171743</A>: <I><SPAN STYLE=\"word-break: break-all;\"> (a+bi)(a-bi) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #126851 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=126851\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (a+bi)(a-bi)<BR>\n" );
document.write( "Use FOIL:<BR>\n" );
document.write( "F: a^2<BR>\n" );
document.write( "O: -abi<BR>\n" );
document.write( "I: +abi<BR>\n" );
document.write( "L: -(bi)^2 = b^2<BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "Combine these to get a^2 + b^2<BR>\n" );
document.write( "-----------------------<BR>\n" );
document.write( "Comment: Memorize this form as you will see it many times.<BR>\n" );
document.write( "(a+bi)(a-bi) = a^2+b^2<BR>\n" );
document.write( "==========================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );