document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=714966>Question 714966</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can anyone simplify this?\r<BR>\n" );
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document.write( "[4y-[5z+1)][4y+(5z+1)]<BR>\n" );
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document.write( "thanks! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #439114 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16949)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=439114\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> [4y-[5z+1)][4y+(5z+1)]\r<BR>\n" );
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document.write( "use the identity (a+b)(a-b)= a^2-b^2\r<BR>\n" );
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document.write( "a= 4y<BR>\n" );
document.write( "b=(5z+1)\r<BR>\n" );
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document.write( "(4y)^2-(5z+1)^2\r<BR>\n" );
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document.write( "16y^2-(25z^2+10z+1)\r<BR>\n" );
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document.write( "16y^2-25z^2-10z-1\r<BR>\n" );
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document.write( " </SPAN>\n" );
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