document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=192104>Question 192104</A>: <I><SPAN STYLE=\"word-break: break-all;\"> find the solution of x^2-21=4x. if the solution is a fraction, enter it in simplest form? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #144149 by </B><A HREF=/tutors/aboutme.mpl?userid=RAY100><B>RAY100(1637)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=RAY100><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=144149\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x^2-21=4x<BR>\n" );
document.write( "subt  4x  each  side\r<BR>\n" );
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document.write( "x^2-4x-21=0\r<BR>\n" );
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document.write( "FACTOR\r<BR>\n" );
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document.write( "(x+3)(x-7)=0\r<BR>\n" );
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document.write( "set  (x+3)=0,   x=(-3)\r<BR>\n" );
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document.write( "set  (x-7)=0,  x=(7)\r<BR>\n" );
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document.write( "check\r<BR>\n" );
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document.write( "(-3)^2-21=4(-3)<BR>\n" );
document.write( "9-21=-12    ok\r<BR>\n" );
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document.write( "(7)^2-21=4(7)<BR>\n" );
document.write( "49-21=28    ok </SPAN>\n" );
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