document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=273305>Question 273305</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Need help did this problem and got it wrong:\r<BR>\n" );
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document.write( "Factor the expression. <BR>\n" );
document.write( "x(x - y - z) + y(x - y - z) <BR>\n" );
document.write( "put answer x to the second -2x-y to the second -yz  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #199679 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=199679\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x * (x - y - z) = x^2 - xy - xz (first part)\r<BR>\n" );
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document.write( "y * (x - y - z) = yx - y^2 - yz (second part)\r<BR>\n" );
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document.write( "since yx is the same as xy, this second part becomes:\r<BR>\n" );
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document.write( "y * (x - y - z) = xy - y^2 - yz (second part)\r<BR>\n" );
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document.write( "add first part and second part together and you get:\r<BR>\n" );
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document.write( "(x^2 - xy - xz) + (xy - y^2 - yz) which becomes:\r<BR>\n" );
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document.write( "x^2 - xy - xz + xy - y^2 - yz.\r<BR>\n" );
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document.write( "The + xy and the - xy cancel out so the equation becomes:\r<BR>\n" );
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document.write( "x^2 - xz - y^2 - yz\r<BR>\n" );
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document.write( "your answer was:\r<BR>\n" );
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document.write( "x^2 - 2x - y^2 - yz\r<BR>\n" );
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document.write( "not sure where you got the 2x from.\r<BR>\n" );
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document.write( "I believe that should have been zx or xz.\r<BR>\n" );
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