document.write( "Question 729293: the length of a rectangle is 1 cm less than 3 times the width. The rectangle has an area of 24 square cm. find the exact length of a diagonal of this rectangle \n" ); document.write( "
Algebra.Com's Answer #445827 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
x = length
\n" ); document.write( "y = width
\n" ); document.write( "x = -1+3y
\n" ); document.write( "d = diagonal\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "AREA, \"%283y-1%29y=24\"
\n" ); document.write( "FIND DIAGONAL, d.
\n" ); document.write( "\"d%5E2=x%5E2%2By%5E2\"
\n" ); document.write( "\"d%5E2=%283y-1%29%5E2%2By%5E2\"
\n" ); document.write( "\"d=sqrt%28%283y-1%29%5E2%2By%5E2%29\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Using area equation, first find y.
\n" ); document.write( "\"3y%5E2-y=24\"
\n" ); document.write( "\"3y%5E2-y-24=0\"
\n" ); document.write( "for practical purposes, \"highlight%28y=3%29\". (used general quadratic solution formula).\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Using formula just found for d, diagonal, \"d=sqrt%28%283%2A3-1%29%5E2%2B3%2A3%29\", \"highlight%28d=sqrt%2873%29%29\", the Diagonal.
\n" ); document.write( "
\n" ); document.write( "
\n" );