document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=614848>Question 614848</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Factor the following polynomial completely.\r<BR>\n" );
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document.write( "-x^2y^2 + x^4 + 4y^2 - 4x^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 #386740 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=386740\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> grouping ___ (-x^2y^2 + 4 y^2) + (x^4 - 4x^2)\r<BR>\n" );
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document.write( "factoring ___ -y^2(x^2 - 4) + x^2(x^2 - 4)\r<BR>\n" );
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document.write( "rearranging ___ (x^2 - y^2)(x^2 - 4)\r<BR>\n" );
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document.write( "factoring (again) ___ (x + y)(x - y)(x + 2)(x - 2) ___ difference of squares, twice </SPAN>\n" );
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