document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=939556>Question 939556</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find an integer c such that the equation 4x^2+cx=9=0 has a double real root. <BR>\n" );
document.write( "please help me with this problem thank you. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #572542 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=572542\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find an integer c such that the equation 4x^2+cx+9=0 has a double real root. <BR>\n" );
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document.write( "Condition required to have double real root:: b^2-4ac = 0<BR>\n" );
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document.write( "Solve:: c^2 -4*4*9 = 0<BR>\n" );
document.write( "c^2 -144 = 0<BR>\n" );
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document.write( "(c-12)(c+12) = 0<BR>\n" );
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document.write( "c = 12 or c = -12<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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