document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=906422>Question 906422</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Let f (x) = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x%5E2+%2B+4x++-++7+ ALIGN=MIDDLE  ALT=\"+x%5E2+%2B+4x++-++7+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(a) Find the coordinates of the vertex.<BR>\n" );
document.write( "(x, y) = ___ \r<BR>\n" );
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document.write( "(b) The [Either max/min] value of f is <BR>\n" );
document.write( "f ( __ ) = __ \r<BR>\n" );
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document.write( "(c) Find the domain and range of f  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #549835 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=549835\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let f (x) = x^2+4x-7<BR>\n" );
document.write( "(a) Find the coordinates of the vertex.<BR>\n" );
document.write( "complete the square:<BR>\n" );
document.write( "y=x^2+4x-7<BR>\n" );
document.write( "y=(x^2+4x+4)-4-7<BR>\n" );
document.write( "y=(x+2)^2-11<BR>\n" );
document.write( "(x, y) = (-2,-11)<BR>\n" );
document.write( "..<BR>\n" );
document.write( "(b) The [Either max/min] value of f is<BR>\n" );
document.write( "f ( min ) y=-11<BR>\n" );
document.write( "..<BR>\n" );
document.write( "(c)domain: (-&#8734;,&#8734;)<BR>\n" );
document.write( " range:(-11,&#8734;) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );