document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=175957>Question 175957</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 188.) (7xy˛-10y)(7xy˛+10y)<BR>\n" );
document.write( "	<BR>\n" );
document.write( "221.) (xy+ab˛)(xy-ab˛)\r<BR>\n" );
document.write( "\n" );
document.write( "simplify....thanks<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #131082 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=131082\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> These both follow the pattern (a-b)(a+b) = a^2-b^2<BR>\n" );
document.write( "-----------------------------\r<BR>\n" );
document.write( "\n" );
document.write( "(7xy˛-10y)(7xy˛+10y) = (7xy^2)^2 - (10y)^2 = 49x^2y^4 - 100y^2<BR>\n" );
document.write( "====================================\r<BR>\n" );
document.write( "\n" );
document.write( "221.) (xy+ab˛)(xy-ab˛) <BR>\n" );
document.write( "= (xy)^2 - (ab^2)^2 = x^2y^2 - a^2b^4<BR>\n" );
document.write( "=========================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );