document.write( "Question 328716: The length of a rectangle is 9cm mor than its width. If the area of the rectangle is 76cm^2, find the dimensions. Round to the nearest thousandth if necessary. \n" ); document.write( "
Algebra.Com's Answer #235486 by mananth(16946)\"\" \"About 
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let width be x cm
\n" ); document.write( "length = x+9 cm\r
\n" ); document.write( "\n" ); document.write( "Area = 76 cm^2
\n" ); document.write( "Area = L*W
\n" ); document.write( "x(x+9)=76
\n" ); document.write( "x^2+9x=76
\n" ); document.write( "x^2+9x-76=0
\n" ); document.write( "find the roots of the equation x1 x2
\n" ); document.write( "\"x1=%28-b%2Bsqrt%28b%5E2-4%2Aa%2Ac%29%29%2F%282%2Aa%29\"
\n" ); document.write( "\"x1=%28-9%2Bsqrt%2881-4%2A1%2A%28-76%29%29%29%2F%282%2A1%29\"
\n" ); document.write( "x1=5.311 cm width
\n" ); document.write( "\"x2=%28-9-sqrt%2881-4%2A1%2A%28-76%29%29%29%2F%282%2A1%29\"
\n" ); document.write( "=-14.31 cm ignore this value
\n" ); document.write( "length = 5.311+9=14.311 cm
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