document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=823993>Question 823993</A>: <I><SPAN STYLE=\"word-break: break-all;\"> what is the volume of x if the volume of the box is 648 cubic feet, h=8 ft., L=x-7, W=x-7 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #495996 by </B><A HREF=/tutors/aboutme.mpl?userid=algebrahouse.com><B>algebrahouse.com(1659)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=algebrahouse.com><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=algebrahouse.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=495996\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Volume of a rectangular prism (or box) is:<BR>\n" );
document.write( "V = lwh   {length x width x height}\r<BR>\n" );
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document.write( "8(x - 7)(x - 7) = 648 {substituted given information into volume formula}<BR>\n" );
document.write( "(x - 7)(x - 7) = 81 {divided each side by 8}<BR>\n" );
document.write( "x² - 14x + 49 = 81 {used foil method to multiply binomials}<BR>\n" );
document.write( "x² - 14x - 32 = 0 {subtracted 81 from each side}<BR>\n" );
document.write( "(x - 16)(x + 2) = 0 {factored into two binomials}<BR>\n" );
document.write( "x - 16 = 0 or x + 2 = 0 {set each factor equal to 0}<BR>\n" );
document.write( "x = 16 or x = -2 {solved each equation for x}<BR>\n" );
document.write( "x = 16 {x cannot be negative for x - 7 being the width and length}\r<BR>\n" );
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document.write( "the value of x is 16<BR>\n" );
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