document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=539115>Question 539115</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the error in this proof that 2=1.<BR>\n" );
document.write( "	x=y<BR>\n" );
document.write( "	X^2=xy<BR>\n" );
document.write( "	X^2-y^2=xy-y^2<BR>\n" );
document.write( "	(x+y)(x-y)=y(x-y)<BR>\n" );
document.write( "	((x+y)(x-y)/(x-y))=(y(x-y)/(x-y))<BR>\n" );
document.write( "	             <BR>\n" );
document.write( "	X+y=y<BR>\n" );
document.write( "	Y+y=y<BR>\n" );
document.write( "	2y=y<BR>\n" );
document.write( "	(2y/y)=(y/y)<BR>\n" );
document.write( "	2=1<BR>\n" );
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document.write( "The error is here:\r<BR>\n" );
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document.write( "((x+y)(x-y)/(x-y))=(y(x-y)/(x-y))\r<BR>\n" );
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document.write( "Because we know that x=y\r<BR>\n" );
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document.write( "So x-y = 0\r<BR>\n" );
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document.write( "And we cannot divide by zero.\r<BR>\n" );
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