document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=639861>Question 639861</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi<BR>\n" );
document.write( "This question has to do with negative exponents. I am trying to rewrite this expression without negative exponents.\r<BR>\n" );
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document.write( "a^-1 - b^-1<BR>\n" );
document.write( "___________<BR>\n" );
document.write( "a^-3 - b^-3\r<BR>\n" );
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document.write( "I believe the answer is:\r<BR>\n" );
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document.write( "a^2b^2<BR>\n" );
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document.write( "a^2+ab+b^2\r<BR>\n" );
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document.write( "I just don't know the steps on how to get there.\r<BR>\n" );
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document.write( "Thank you<BR>\n" );
document.write( "Regards<BR>\n" );
document.write( "Mike </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #403114 by </B><A HREF=/tutors/aboutme.mpl?userid=sachi><B>sachi(548)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=sachi><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=sachi><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=403114\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a^-1 - b^-1<BR>\n" );
document.write( "__________<BR>\n" );
document.write( "a^-3 - b^-3\r<BR>\n" );
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document.write( "=(1/a-1/b)/(1/a^3-1/b^3)<BR>\n" );
document.write( "=[(b-a)/ab]/[(b^3-a^3)/a^3b^3]<BR>\n" );
document.write( "=[(b-a)/(b^3-a^3)]<BR>\n" );
document.write( "=[(b-a)/(b-a)(b^2+a^2+ab)] <BR>\n" );
document.write( "=[1/(b^2+a^2+ab)]<BR>\n" );
document.write( "=a^2b^2/(b^2+a^2+ab) ans<BR>\n" );
document.write( " </SPAN>\n" );
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