document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=447286>Question 447286</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A door 8 feet long and 4 feet wide is made from a pane of glass in a wooden frame b feet wide on all teh sides. The area of the entire door is 1 square foot less than three times the area of wooden frame. How wide is the frame to the nearest tenth?\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #307947 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=307947\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> door length = 8 ft<BR>\n" );
document.write( "width == 4 ft\r<BR>\n" );
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document.write( "Glass pan length = 8-2b<BR>\n" );
document.write( "glass pane width = 4-2b\r<BR>\n" );
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document.write( "Total door area - Area of pane = Area of frame<BR>\n" );
document.write( "32-(8-2b)(4-2b)= arae of the frame<BR>\n" );
document.write( "32= 3(32-(8-2b)(4-2b))-1<BR>\n" );
document.write( "33= 3(32-(32-24b+4b^2))<BR>\n" );
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document.write( "11=(32-(32-24b+4b^2))<BR>\n" );
document.write( "11=32-32+24b^2-4b^2<BR>\n" );
document.write( "4b^2-24b+11=0<BR>\n" );
document.write( "Find the roots of the equation by quadratic formula			<BR>\n" );
document.write( "a=	4,	b=	-24,	c=	11	<BR>\n" );
document.write( "Let the roots be x1.x2<BR>\n" );
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document.write( "b^2-4ac=576-176			<BR>\n" );
document.write( "b^2-4ac=400<BR>\n" );
document.write( "sqrt(400)=20<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29 ALIGN=MIDDLE  ALT=\"x=%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >						<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x1=%28-b%2Bsqrt%28b%5E2-4ac%29%29%2F%282a%29 ALIGN=MIDDLE  ALT=\"x1=%28-b%2Bsqrt%28b%5E2-4ac%29%29%2F%282a%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >						<BR>\n" );
document.write( "x1=(24+	20)/8	<BR>\n" );
document.write( "x1=5.5					<BR>\n" );
document.write( "x2=(24-20)/8		<BR>\n" );
document.write( "x2=0.5				<BR>\n" );
document.write( "Obviously the width will be 0.5 ft.\r<BR>\n" );
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document.write( "m.ananth@hotmail.ca	\r<BR>\n" );
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