document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=724015>Question 724015</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me with these problems:\r<BR>\n" );
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document.write( "Finding the maximum y-value on the graph of y=f(x). <BR>\n" );
document.write( "My problem is f(x)= -x^2+8x+7\r<BR>\n" );
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document.write( "Using quadratic formula to find any x-intercepts on graph of equation.  My problem is y=x^2+6x-1.\r<BR>\n" );
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document.write( "and \r<BR>\n" );
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document.write( "To solve by completing the square what value should be added to each side of equation with problem x^2+16x=-4.\r<BR>\n" );
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document.write( "Thanking you in advance for your help.   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #443538 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=443538\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Finding the maximum y-value on the graph of y=f(x). <BR>\n" );
document.write( "My problem is f(x)= -x^2+8x+7<BR>\n" );
document.write( "Vertex occurs at x = -b/(2a) = -8/(2*-1) = 4<BR>\n" );
document.write( "Max at f(4) = -16+32+7 = 16+7 = 23<BR>\n" );
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document.write( "Using quadratic formula to find any x-intercepts on graph of equation. My problem is y=x^2+6x-1.<BR>\n" );
document.write( "Let y = 0<BR>\n" );
document.write( "x^2+6x-1 = 0<BR>\n" );
document.write( "x = [-6+-sqrt(36-4*-1)]/2<BR>\n" );
document.write( "x = [-6+-sqrt(40)]/2<BR>\n" );
document.write( "x = [-3+-sqrt(10)]<BR>\n" );
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document.write( "and <BR>\n" );
document.write( "To solve by completing the square what value should be added to each side of equation with problem x^2+16x=-4.<BR>\n" );
document.write( "x^2+16x+64 = -4+64<BR>\n" );
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document.write( "(x+8)^2 = 60<BR>\n" );
document.write( "x+8 = +-2sqrt(15)<BR>\n" );
document.write( "x = -8+-2sqrt(15)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( " </SPAN>\n" );
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