document.write( "Question 1086883: An interior decorator is buying wallpaper for two square walls. One wall is 4 feet wider than the other. If he/she needs 170 square feet of wall paper, what are the dimensions of the wall?Show solution \n" ); document.write( "
Algebra.Com's Answer #701180 by Boreal(15235)\"\" \"About 
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smaller wall has side x
\n" ); document.write( "larger wall has side x+4
\n" ); document.write( "area of smaller wall is x^2; area of larger wall is (x+4)^2=x^2+8x+16.
\n" ); document.write( "These areas add to 170
\n" ); document.write( "So 2x^2+8x+16=170
\n" ); document.write( "x^2+4x+8=85
\n" ); document.write( "x^2+4x-77=0
\n" ); document.write( "(x+11)(X-7)=0
\n" ); document.write( "x=7 feet, only positive root.
\n" ); document.write( "one wall is 7 x 7 feet or 49 ft^2
\n" ); document.write( "other wall is 11 x 11 feet or 121 ft^2
\n" ); document.write( "They add to 170 ft^2.
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