document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1133675>Question 1133675</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If x-y=8 and xy=7, then x^3-y^3=<BR>\n" );
document.write( "Show solution step by step<BR>\n" );
document.write( "660<BR>\n" );
document.write( "670<BR>\n" );
document.write( "680<BR>\n" );
document.write( "690 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #750929 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=750929\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "A common type of question on a competitive math test....<br><BR>\n" );
document.write( "Use the factorization pattern for x^3-y^3 and use the given information to evaluate the resulting factors.<br><PRE STYLE=\"white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;\">\r\n" );
document.write( "x^3-y^3 = (x-y)(x^2+xy+y^2)\r\n" );
document.write( "        = (x-y)((x^2-2xy+y^2)+3xy)\r\n" );
document.write( "        = (x-y)((x-y)^2+3(xy)</PRE><BR>\n" );
document.write( "You are given the values of (x-y) and (xy); plug them in to find the answer. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );