document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=146734>Question 146734</A>: <I><SPAN STYLE=\"word-break: break-all;\"> x minus the square root of -2x+21 = 9.<BR>\n" );
document.write( "What does x equal?<BR>\n" );
document.write( "Im not sure how to write the radical sign but -2x+21 is whats under the radical sign.<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 #107156 by </B><A HREF=/tutors/aboutme.mpl?userid=nabla><B>nabla(475)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nabla><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=107156\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x - Sqrt[-2 x + 21] = 9<BR>\n" );
document.write( "Sqrt[-2 x + 21] = x - 9<BR>\n" );
document.write( "-2 x + 21 = x^2 - 18 x + 81<BR>\n" );
document.write( "0 = x^2 - 16 x + 60<BR>\n" );
document.write( "0 = (x-6)(x-10)\r<BR>\n" );
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document.write( "gives x=6 or x=10,\r<BR>\n" );
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document.write( "but x=6 makes 6 - Sqrt[9]=3 which is not= 9. We therefore exclude this solution.\r<BR>\n" );
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document.write( "Leaving x=10 as the solution. </SPAN>\n" );
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