document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=16633>Question 16633</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 4. Three times the square of a certain positive number exceeds six times the number by nine. Find the number: <BR>\n" );
document.write( "a. 3 b. 6 c. 4 d. 9 e. none <BR>\n" );
document.write( "The answer is A, but how? I don't think I used the correct formula. Please help! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #27573 by </B><A HREF=/tutors/aboutme.mpl?userid=fractalier><B>fractalier(6550)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fractalier><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/cgi-bin/show-face.mpl?user=fractalier><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=27573\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let the number be x. Then we have<BR>\n" );
document.write( "3x^2 - 6x = 9<BR>\n" );
document.write( "3x^2 - 6x - 9 = 0<BR>\n" );
document.write( "x^2 - 2x - 3 = 0<BR>\n" );
document.write( "(x - 3)(x + 1) = 0<BR>\n" );
document.write( "x = 3 and x = -1<BR>\n" );
document.write( "but since you need positive only...<BR>\n" );
document.write( "x = 3  <BR>\n" );
document.write( "Choice A. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );