document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=158103>Question 158103</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the value for k that will make 4x^2+6.4x +k a perfect square.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #116501 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=116501\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">     Find the value for k that will make 4x^2+6.4x +k a perfect square. <BR>\n" );
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document.write( "Take the coefficient 'b' and divide by 2:<BR>\n" );
document.write( "3.2<BR>\n" );
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document.write( "Square the number: <BR>\n" );
document.write( "10.24 (this is the value of k)<BR>\n" );
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document.write( "Therefore,<BR>\n" );
document.write( "4x^2+6.4x +10.24<BR>\n" );
document.write( "(2x+3.2)(2x+3.2)<BR>\n" );
document.write( "(2x+3.2)^2<BR>\n" );
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