\r\n" );
document.write( "

\r\n" );
document.write( "\r\n" );
document.write( "

\r\n" );
document.write( "\r\n" );
document.write( "The coefficient of x is 1.\r\n" );
document.write( "Multiply it by
. 

\r\n" );
document.write( "Square what you get. 

\r\n" );
document.write( "Add that to both sides of the equation.\r\n" );
document.write( "\r\n" );
document.write( "

\r\n" );
document.write( "\r\n" );
document.write( "The left side now factors as
which we write\r\n" );
document.write( "simply as
, and combine the terms on the right.\r\n" );
document.write( "\r\n" );
document.write( "

\r\n" );
document.write( "\r\n" );
document.write( "Since
,\r\n" );
document.write( "\r\n" );
document.write( "

\r\n" );
document.write( "\r\n" );
document.write( "We take square roots of both sides, remembering the ± on the right:\r\n" );
document.write( "\r\n" );
document.write( "

\r\n" );
document.write( "\r\n" );
document.write( "Now we get two answers, one using the + sign and one using the - sign:\r\n" );
document.write( "\r\n" );
document.write( "

, 

\r\n" );
document.write( "\r\n" );
document.write( "

, 

\r\n" );
document.write( "\r\n" );
document.write( "Edwin
\n" );
document.write( "