document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=601327>Question 601327</A>: <I><SPAN STYLE=\"word-break: break-all;\"> (a+b)^2-(c+d)^2<BR>\n" );
document.write( "How do you factorize? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #379708 by </B><A HREF=/tutors/aboutme.mpl?userid=flame8855><B>flame8855(424)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=flame8855><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=flame8855><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=379708\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> assume A= a + b<BR>\n" );
document.write( "and B= c+d<BR>\n" );
document.write( "so substitute<BR>\n" );
document.write( "A^2 - B^2<BR>\n" );
document.write( "= (A-B)(A+B)<BR>\n" );
document.write( "= (a+b-c-d) (a+b+c+d) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );