document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=273311>Question 273311</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Could you show me step by step this equation:<BR>\n" );
document.write( "p2 - q2 = (p + q)  (        ) thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #199680 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=199680\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> p^2 - q^2 = (p+q) * (p-q)\r<BR>\n" );
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document.write( "(p+q) * (p-q) = p*(p-q) + q*(p-q) which equals:\r<BR>\n" );
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document.write( "p^2 - pq + qp - q^2 \r<BR>\n" );
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document.write( "since pq is the same as qp, this expression becomes:\r<BR>\n" );
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document.write( "p^2 - pq + pq - q^2\r<BR>\n" );
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document.write( "The -pq and the +pq cancel out and you are left with:\r<BR>\n" );
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document.write( "p^2 - q^2 </SPAN>\n" );
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