document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=45478>Question 45478</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the product. I am struggling with this one.  Thanks\r<BR>\n" );
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document.write( "[( 4x - y) + 3z][( 4x - y) - 3z] <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #30226 by </B><A HREF=/tutors/aboutme.mpl?userid=jake_6233><B>jake_6233(74)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jake_6233><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=30226\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> [( 4x - y) + 3z][( 4x - y) - 3z]<BR>\n" );
document.write( "The first thing to realize is that this problem is of the form (a+b)(a-b)<BR>\n" );
document.write( "a= (4x-y)  b= 3z    We know (a+b)(a-b)= a^2-b^2 so substituting we have<BR>\n" );
document.write( "(4x-y)^2 -(3z)^2  I would imagine you were trying to use the foil method and got a headache very soon after beginning the problem  Remember this problem is helping you to recognize a concept here not necesarily to FOIL Please let me know if this helps you </SPAN>\n" );
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