document.write( "Question 170089This question is from textbook
\n" ); document.write( ": A small garden measures 8 feet by 10 feet. A uniform border around the garden increases the total area to 143 square feet. What is the width of the border? \n" ); document.write( "
Algebra.Com's Answer #125547 by Alan3354(69443)\"\" \"About 
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A small garden measures 8 feet by 10 feet. A uniform border around the garden increases the total area to 143 square feet. What is the width of the border?
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\n" ); document.write( "It's exactly 3 feet. 11 x 13 = 143
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\n" ); document.write( "New area = (8+2x)(10+2x) = 143
\n" ); document.write( "80 + 36x + 4x^2 = 143
\n" ); document.write( "4x^2 + 36x - 63 = 0
\n" ); document.write( "x = [-36 +- sqrt(36^2 - 4*4*-63]/8
\n" ); document.write( "x = [-36 +- sqrt(2304)]/8
\n" ); document.write( "x = [-36 +- 48]/8
\n" ); document.write( "Positive solution:
\n" ); document.write( "x = 1.5 ft. (width of the border)
\n" ); document.write( "1.5 ft on all sides increases the width and length by 3 feet.
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\n" ); document.write( "The other solver seems to have read it as \"increases it by 143\", and his solution is correct for that.\r
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