document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=488110>Question 488110</A>: <I><SPAN STYLE=\"word-break: break-all;\"> (-4+6i)(-3+7i) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #333290 by </B><A HREF=/tutors/aboutme.mpl?userid=richard1234><B>richard1234(7193)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richard1234><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=richard1234><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=333290\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The other tutor is referring to it as FOIL (instead of foil) because FOIL is an acronym for \"first, outer, inner, last,\" an order in which you can multiply two binomials. For example,\r<BR>\n" );
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document.write( "(-4+6i)(-3+7i) = (-4)(-3) + (-4)(7i) + (6i)(-3) + (6i)(7i)\r<BR>\n" );
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document.write( "= 12 - 28i - 18i - 42\r<BR>\n" );
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document.write( "= -30 - 46i\r<BR>\n" );
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document.write( "The textbook writers must have come up with FOIL pretty recently. I don't remember learning that acronym in my algebra class...and I'm a senior in HS so it's only been 5 or so years since I learned algebra. </SPAN>\n" );
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