document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=118283>Question 118283</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the value of c that will make;\r<BR>\n" );
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document.write( "9x2+30x+c a perfect square trinomial\r<BR>\n" );
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document.write( "thank -you 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 #86405 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=86405\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find the value of c that will make;\r<BR>\n" );
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document.write( "9x2+30x+c a perfect square trinomial<BR>\n" );
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document.write( "Form:<BR>\n" );
document.write( "(a+b)^2 = a^2+2ab+b^2<BR>\n" );
document.write( "Your Problem:<BR>\n" );
document.write( "a^2 = 9x^2 implies that a = 3x<BR>\n" );
document.write( "2ab=30x implies that 2(3x)b = 30x implies that b = 5<BR>\n" );
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document.write( "Therefore 9x^2+30x+25 is a perfect trinomial square.<BR>\n" );
document.write( "Therefore c = 25<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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