document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=409868>Question 409868</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How would you write f(x)=5x^2+15x-9 in vertex form? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #288392 by </B><A HREF=/tutors/aboutme.mpl?userid=edjones><B>edjones(8007)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=edjones><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=edjones><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=288392\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a(x-h)^2+k Vertex form.<BR>\n" );
document.write( "f(x)=5x^2+15x-9<BR>\n" );
document.write( "=5(x^2+3x)-9<BR>\n" );
document.write( "=5(x^2+3x + 9/4 - 9/4) -9<BR>\n" );
document.write( "=5(x^2+3x + 9/4)-5(9/4)-9<BR>\n" );
document.write( "=5(x + 3/2)^2 - 81/4 So h=-3/2, k=-81/4, a=5 the vertex is (-3/2, -81/4)<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Ed </SPAN>\n" );
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