document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=630606>Question 630606</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hello <BR>\n" );
document.write( "I have couple questions.<BR>\n" );
document.write( "1) what is the exact values of x^2+4x-20=0<BR>\n" );
document.write( "and how can I find it\r<BR>\n" );
document.write( "\n" );
document.write( "2)a floor measures 12m by 8m. a rug covers one-third of the floor.the uncovered part of the floor forms a uniform strip around the rag . how wide is the strip ?\r<BR>\n" );
document.write( "\n" );
document.write( "Thanks for helping </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #397041 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=397041\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1) what is the exact values of x^2+4x-20=0<BR>\n" );
document.write( "and how can i find it?<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Factor:<BR>\n" );
document.write( "x = [-4 +- sqrt(16-4*-20)]/2<BR>\n" );
document.write( "x = [-4 +- sqrt(96)]/2<BR>\n" );
document.write( "x = [-4 +- 4sqrt(6)]/2<BR>\n" );
document.write( "x = -2 + 2sqrt(6) or x = -2 - 2sqrt(6)<BR>\n" );
document.write( "------------------------------------------\r<BR>\n" );
document.write( "\n" );
document.write( " <BR>\n" );
document.write( "2)a floor measures 12m by 8m. a rug covers one-third of the floor.the uncovered part of the floor forms a uniform strip around the rug . how wide is the strip ?<BR>\n" );
document.write( "Draw a picture of a rectangle inside a rectangle.<BR>\n" );
document.write( "Area of the outer rectangle including the area of the inner: 12m x 8m = 96 m^2<BR>\n" );
document.write( "Area outside the inner and inside the outer rectangle: (1/3)96 = 32 m^2<BR>\n" );
document.write( "------<BR>\n" );
document.write( "Dimensions of that area: (12-2x)(8-2x) = 32 m&3<BR>\n" );
document.write( "96-40x+4x^2 = 32<BR>\n" );
document.write( "x^2 - 10x + 24 = 0<BR>\n" );
document.write( "(x-6)(x-4) = 0<BR>\n" );
document.write( "x = 4m (width of the strip)<BR>\n" );
document.write( "===========================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "=============== <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );