document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1092668>Question 1092668</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Difference of Squares<BR>\n" );
document.write( "9m^2-1<BR>\n" );
document.write( "I know the answer is (3m^2-1)(3m+1).  A friend helped me come to the conclusion.  She was unable to explain to me how I would get there.  I am trying to learn this for the rest of my class.  I don't grasp it and my text doesn't explain it.   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #707291 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=707291\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 9m^2-1<BR>\n" );
document.write( "I know the answer is (3m^2-1)(3m+1)<BR>\n" );
document.write( "==============<BR>\n" );
document.write( "Close, but it's 9m^2-1<BR>\n" );
document.write( "I know the answer is (3m-1)(3m+1)<BR>\n" );
document.write( "---<BR>\n" );
document.write( "(3m-1)(3m+1) = 3m*(3m+1) - 1*(3m+1)<BR>\n" );
document.write( "= 9m^2 + 3m  - 3m - 1<BR>\n" );
document.write( "= 9m^2 - 1<BR>\n" );
document.write( "=====================<BR>\n" );
document.write( "a^2 - b^2 = (a-b)*(a+b)<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );