document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=385308>Question 385308</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Use the “difference of squares” rule to factor the following expression:<BR>\n" );
document.write( "                       36x^2-9y^2<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #272632 by </B><A HREF=/tutors/aboutme.mpl?userid=texttutoring><B>texttutoring(324)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=texttutoring><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=texttutoring><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=272632\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The difference of squares rule is this:\r<BR>\n" );
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document.write( "a^2 - b^2 = (a+b)(a-b)\r<BR>\n" );
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document.write( "In your case, a^2=36x^2 and b^2=9y^2, therefore:\r<BR>\n" );
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document.write( "36x^2 - 9y^2 = (6x+3y)(6x-3y)\r<BR>\n" );
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document.write( "That's it. It's factored! </SPAN>\n" );
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