document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=232815>Question 232815</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1. If a and b are real numbers, then the product of a+bi and a-bi is <BR>\n" );
document.write( "(1) Always imaginary<BR>\n" );
document.write( "(2) Always a real number<BR>\n" );
document.write( "(3) Somtimes, but not always, a real number<BR>\n" );
document.write( "(4) Somtimes, but not alwaus, imaginary<BR>\n" );
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document.write( "Please help me with this question and explain how you got the answer thank you </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #171944 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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/cgi-bin/show-face.mpl?user=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=171944\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If a and b are real numbers, then the product of a+bi and a-bi is <BR>\n" );
document.write( "(1) Always imaginary<BR>\n" );
document.write( "(2) Always a real number<BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "It's 2, always a real number.<BR>\n" );
document.write( "Multiply them.<BR>\n" );
document.write( "(a+bi)*(a-bi) = a^2 - (bi)^2<BR>\n" );
document.write( "= a^2 - (-b^2)<BR>\n" );
document.write( "= a^2 + b^2<BR>\n" );
document.write( "----------------<BR>\n" );
document.write( "example:<BR>\n" );
document.write( "(2+3i)*(2-3i) = 4+9 = 13<BR>\n" );
document.write( " </SPAN>\n" );
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