document.write( "Question 925988: You have a pool that measure 15 yards by 10 yards. You want to build a deck around all four sides of the pool and you want to increase the total area to 250 square yards. What is the width of the deck? \n" ); document.write( "
Algebra.Com's Answer #561904 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
x, the uniform width around the pool.\r
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\n" ); document.write( "\n" ); document.write( "\"%2815%2B2x%29%2810%2B2x%29-15%2A10=250\"; you want the difference in area to be 250 square yards. Simplify this equation. \r
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\n" ); document.write( "\n" ); document.write( "\"%2815%2B2x%29%2810%2B2x%29=250%2B150\"
\n" ); document.write( "\"15%2A10%2B50x%2B4x%5E2=250%2B150\"
\n" ); document.write( "\"50x%2B4x%5E2=250\"
\n" ); document.write( "\"25x%2B2x%5E2=125\"
\n" ); document.write( "\"2x%5E2%2B25x-125=0\"\r
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\n" ); document.write( "\n" ); document.write( "You can try to factor, but alternatively, preparing for general solution method,
\n" ); document.write( "discriminant is \"25%5E2-4%2A2%28-125%29=625%2B8%2A125=1625=25%2A65=5%2A5%2A5%2A13\".\r
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\n" ); document.write( "\n" ); document.write( "\"x=%28-25%2Bsqrt%285%5E3%2A13%29%29%2F4\"\r
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\n" ); document.write( "\n" ); document.write( "\"highlight%28x=%28-25%2B5%2Asqrt%2865%29%29%2F4%29\"\r
\n" ); document.write( "\n" ); document.write( "About 3.83 yards.
\n" ); document.write( "About 3 yards 2 feet 6 inches
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