document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=831068>Question 831068</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The formula for the surface area of a cube is SA=6e^2. If the surface area of this cube is 6x^2-24x+24, what is the measure of one edge?\r<BR>\n" );
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document.write( "a) x-2<BR>\n" );
document.write( "b) x-4<BR>\n" );
document.write( "c) x+2<BR>\n" );
document.write( "d) x-6\r<BR>\n" );
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document.write( "I already know the answer to this question is a). I just want to know WHY it is a). How do you figure out this question? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #501112 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=501112\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 6x^2-24x+24\r<BR>\n" );
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document.write( "6e2=6x^2-24x+24\r<BR>\n" );
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document.write( "/6\r<BR>\n" );
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document.write( "e^2=x^2-4x+4\r<BR>\n" );
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document.write( "e^2= (x-2)^2\r<BR>\n" );
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document.write( "taking positive roots\r<BR>\n" );
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document.write( "e=(x-2)\r<BR>\n" );
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document.write( "which is the side </SPAN>\n" );
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