document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=659970>Question 659970</A>: <I><SPAN STYLE=\"word-break: break-all;\"> factor completely\r<BR>\n" );
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document.write( "25x^4 - 100y^2<BR>\n" );
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document.write( "25x^4 - 100y^2<BR>\n" );
document.write( "(5x^2 - 10y)(5x^2 + 10y) mixed signs due to - 100y^2<BR>\n" );
document.write( "25(x^2-2y)(x^2+2y)\r<BR>\n" );
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document.write( "Alternatively,<BR>\n" );
document.write( "factor out 25 immediately<BR>\n" );
document.write( "25(x^4-4y^2)<BR>\n" );
document.write( "25(x^2+2y)(x^2-2y) </SPAN>\n" );
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