document.write( "Question 873346: The length of a rectangular backyard is 13 feet longer than its width (x). What is the area of the backyard in terms of x? \n" ); document.write( "
Algebra.Com's Answer #526802 by harpazo(655)\"\" \"About 
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Let A(x) = the area of the rectangle in terms of x.\r
\n" ); document.write( "\n" ); document.write( "Area = length times width\r
\n" ); document.write( "\n" ); document.write( "Length = x + 13\r
\n" ); document.write( "\n" ); document.write( "Width = x\r
\n" ); document.write( "\n" ); document.write( "Area = (x+13)(x)\r
\n" ); document.write( "\n" ); document.write( "Area = x^2 + 13x\r
\n" ); document.write( "\n" ); document.write( "A(x) = x^2 + 13x\r
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