document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1031182>Question 1031182</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the maximum or the minimum value of f(x) = 5x2 &#8722; 9x + 1 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #645912 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=645912\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find the maximum or the minimum value of f(x) = 5x2 - 9x + 1<BR>\n" );
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document.write( "f'(x) = 10x - 9 = 0<BR>\n" );
document.write( "x = 9/10<BR>\n" );
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document.write( "Min: f(9/10) = 5*(9/10)^2 - 81/10 + 1 = -61/20<BR>\n" );
document.write( "--> (9/10,-61/20)<BR>\n" );
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document.write( "w/o calculus:<BR>\n" );
document.write( "Min at x = -b/2a = 18/10 = 9/10\r<BR>\n" );
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