document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=503831>Question 503831</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find b and c so that y= -20x^2 +bx +c has vertex (-5,-3).    Thanks, i already know that b= -200 but wasnt sure how to get c\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #339565 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=339565\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find b and c so that y= -20x^2 +bx +c has vertex (-5,-3). Thanks, i already know that b= -200 but wasn't sure how to get c<BR>\n" );
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document.write( "So you have -20x^2 - 200x + c = y<BR>\n" );
document.write( "Replace x and y<BR>\n" );
document.write( "-20(-5^2) - 200(-5) + c = -3<BR>\n" );
document.write( "-500 + 1000 + c = -3<BR>\n" );
document.write( "500 + c = -3<BR>\n" );
document.write( "c = -3 - 500<BR>\n" );
document.write( "c = -503<BR>\n" );
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