document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=158003>Question 158003</A>: <I><SPAN STYLE=\"word-break: break-all;\"> determine the constant that should be added to the binomial so that it becomes a perfect square trinomial.  Then write and factor the trinomial.\r<BR>\n" );
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document.write( "x^2-4x<BR>\n" );
document.write( "a.  16; x^2-4x+16=(x-4^2<BR>\n" );
document.write( "b.  -4; x^2-4x-4=(x-2)^2<BR>\n" );
document.write( "c.  -16; x^2-4x-16=(x-4)^2<BR>\n" );
document.write( "d.  4; x^2-4x+4=(x-2)^2-x^4 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #116505 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=116505\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Take half of the x coefficient -4 to get -2. Now square -2 to get 4. So you need to add 4 to make a perfect square trinomial.\r<BR>\n" );
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document.write( "So the answer is choice d. 4; x^2-4x+4=(x-2)^2 (note: the last part that you wrote is a typo) </SPAN>\n" );
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