document.write( "Question 449819: The length of a rectangular gym is 8 meters less than 3 times it's width. Find the dimensions is the area of the gym is 336 square meters. \r
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\n" ); document.write( "\n" ); document.write( "^^ I do not understand how to set up the equation.
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Algebra.Com's Answer #309389 by mananth(16946)\"\" \"About 
You can put this solution on YOUR website!
width=x
\n" ); document.write( "length = 3x-8\r
\n" ); document.write( "\n" ); document.write( "Area = L*W\r
\n" ); document.write( "\n" ); document.write( "x(3x-8)=336
\n" ); document.write( "3x^2-8x=336
\n" ); document.write( "3x^2-8x-336=0\r
\n" ); document.write( "\n" ); document.write( "Find the roots of the equation by quadratic formula
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\n" ); document.write( "a= 3 ,b= -8 ,c= -336
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\n" ); document.write( "b^2-4ac=64-4032
\n" ); document.write( "b^2-4ac=4096
\n" ); document.write( "\"sqrt%284096%29\"=64
\n" ); document.write( "\"x=%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29\"
\n" ); document.write( "\"x1=%28-b%2Bsqrt%28b%5E2-4ac%29%29%2F%282a%29\"
\n" ); document.write( "x1=(8+64)/6
\n" ); document.write( "x1=12
\n" ); document.write( "x2=(8-64)/6
\n" ); document.write( "x2= -9.33
\n" ); document.write( "Ignore negative value
\n" ); document.write( "width = 12
\n" ); document.write( "length = 3x-8===>28
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