document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=380335>Question 380335</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I have started a new section in this class and am not understanding. Could someone explain this please?\r<BR>\n" );
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document.write( "Multiply. Try to recognize the type of product before multiplying. \r<BR>\n" );
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document.write( "42. (4n + 7)(4n &#8722; 7) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #269905 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=269905\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (4n + 7)(4n &#8722; 7)<BR>\n" );
document.write( "Use FOIL:<BR>\n" );
document.write( "F: 4n*4n = 16n^2<BR>\n" );
document.write( "O: 4n*-7 = -28n<BR>\n" );
document.write( "I: 7*4n = +28n<BR>\n" );
document.write( "L: 7*-7 = -49<BR>\n" );
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document.write( "Combine these products to get:<BR>\n" );
document.write( "16n^2-49<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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