document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=428247>Question 428247</A>: <I><SPAN STYLE=\"word-break: break-all;\"> What is the increasing interval of y=x^2-2x-3 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #297716 by </B><A HREF=/tutors/aboutme.mpl?userid=Gogonati><B>Gogonati(855)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Gogonati><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=Gogonati><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=297716\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Solution: The function <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=x%5E2-2x-3 ALIGN=MIDDLE  ALT=\"y=x%5E2-2x-3\"   DISABLED_style= \"max-width:90%; height:auto;\" > is an upward parabola. To find the increasing \r<BR>\n" );
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document.write( "interval we need its vertex, since for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=-b%2F2a ALIGN=MIDDLE  ALT=\"x=-b%2F2a\"   DISABLED_style= \"max-width:90%; height:auto;\" >, we have a minimum.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-b%2F2a=2%2F2=1 ALIGN=MIDDLE  ALT=\"-b%2F2a=2%2F2=1\"   DISABLED_style= \"max-width:90%; height:auto;\" > and the increasing interval is:\r<BR>\n" );
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document.write( " ( 1, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2Binfinity ALIGN=MIDDLE  ALT=\"%2Binfinity\"   DISABLED_style= \"max-width:90%; height:auto;\" >). </SPAN>\n" );
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