document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=325626>Question 325626</A>: <I><SPAN STYLE=\"word-break: break-all;\"> what number is used to complete the sqaure for the equation x^2=20x\r<BR>\n" );
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document.write( "a.)-100<BR>\n" );
document.write( "b.)-10<BR>\n" );
document.write( "c.)10<BR>\n" );
document.write( "d.)100 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #233137 by </B><A HREF=/tutors/aboutme.mpl?userid=AAfter+Search><B>AAfter Search(61)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=AAfter+Search><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=233137\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x^2=20x<BR>\n" );
document.write( "=> x^2 - 20x = 0<BR>\n" );
document.write( "To make the quadratic equation a complete square, the determinant should be zero.<BR>\n" );
document.write( "Hence, if the required equation is x^2 - 20x +c = 0<BR>\n" );
document.write( "Determinant = (-20)^2 - 4 x 1 x c = 0<BR>\n" );
document.write( "=> 400 = 4c<BR>\n" );
document.write( "=> c = 400/4 = 100.<BR>\n" );
document.write( "Answer: d </SPAN>\n" );
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