document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=878041>Question 878041</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am struggling to understand the rules that cause this type of problem to be solved as it is:\r<BR>\n" );
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document.write( "(8.7 + 3.1i) + (6.8 - 7.1i) + (5.4 + 4.1i)\r<BR>\n" );
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document.write( "As per our textbook, the correct combined solution looks like:<BR>\n" );
document.write( "(8.7 + 6.8 + 5.4)+ (3.1 - 7.1 - 4)i\r<BR>\n" );
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document.write( "I understand everything except for the \" - 4\" term. All of the other terms are taken directly in their correct positive and negative form from the original problem, whereas the 4 has switched from positive to negative. I don't understand why. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #529682 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=529682\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Yes, that's incorrect. <BR>\n" );
document.write( "It should be <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%288.7%2B6.8%2B5.4%29%2B%283.1-7.1%2B4.1%29i ALIGN=MIDDLE  ALT=\"%288.7%2B6.8%2B5.4%29%2B%283.1-7.1%2B4.1%29i\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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