document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=110042>Question 110042</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I really don't understand...\r<BR>\n" );
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document.write( "Find the axis of symmetry.\r<BR>\n" );
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document.write( "y=x^2+5x-7\r<BR>\n" );
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document.write( "Thank you! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #80157 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=80157\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Symmetry means that it looks the same on both sides of the axis.<BR>\n" );
document.write( "Do you know the quadratic formula? That's how I figure out the<BR>\n" );
document.write( "axis of symmetry. The formula is:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+ ALIGN=MIDDLE  ALT=\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "rewite it as<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%28-b+%2F+2a%29%2B-+%28sqrt%28+b%5E2-4%2Aa%2Ac+%29%2F+%282%2Aa%29%29+ ALIGN=MIDDLE  ALT=\"x+=+%28-b+%2F+2a%29%2B-+%28sqrt%28+b%5E2-4%2Aa%2Ac+%29%2F+%282%2Aa%29%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The first term is the axis of symmetry, and the 2nd term gives you a<BR>\n" );
document.write( "value of x on the = side and one on the - side<BR>\n" );
document.write( "So find <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-b+%2F+2a ALIGN=MIDDLE  ALT=\"-b+%2F+2a\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The equation is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+x%5E2+%2B+5x+-+7 ALIGN=MIDDLE  ALT=\"y+=+x%5E2+%2B+5x+-+7\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "This is in the form <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+ax%5E2+%2B+bx+%2B+c ALIGN=MIDDLE  ALT=\"y+=+ax%5E2+%2B+bx+%2B+c\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-b+%2F+2a+=+%28-5%29+%2F+%282%2A1%29 ALIGN=MIDDLE  ALT=\"-b+%2F+2a+=+%28-5%29+%2F+%282%2A1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-b+%2F+2a+=+-%285%2F2%29 ALIGN=MIDDLE  ALT=\"-b+%2F+2a+=+-%285%2F2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "x = -5/2 is the axis of symmetry </SPAN>\n" );
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