document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=281216>Question 281216</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How do I write x^2-16x+56=0 in vertex form? And, how do I identify the vertex? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #204284 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=204284\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> How do I write x^2-16x+56 = y in vertex form? And, how do I identify the vertex?<BR>\n" );
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document.write( "x^2-16x + ? = y -56 + ?<BR>\n" );
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document.write( "x^2-16x + 64 = y-56+64<BR>\n" );
document.write( "(x-8)^2 = y+8<BR>\n" );
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document.write( "Vertex at (8,-8)<BR>\n" );
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document.write( "Another Method:<BR>\n" );
document.write( "y = x^2-16x+56<BR>\n" );
document.write( "a = 1 ; b = -16<BR>\n" );
document.write( "The vertex occurs where x = -b/2a = 16/-1 = 8<BR>\n" );
document.write( "f(8) = 8^2 -16*8 + 56 = -8<BR>\n" );
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document.write( "Notice the answers are the same.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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