document.write( "Question 971875: The length and breadth of a rectangular are (5X +3) and (3X-2)cm. Write down in terms of X,
\n" ); document.write( "(a) the perimeter
\n" ); document.write( "(b) area.
\n" ); document.write( "If the area of the rectangle is 230cm²,find the value of X and hence write down the perimeter of the rectangle.
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Algebra.Com's Answer #594254 by anand429(138)\"\" \"About 
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\"l=5x%2B3\"
\n" ); document.write( "\"b=3x-2\"
\n" ); document.write( "So, the perimeter = \"2l%2B2b\"
\n" ); document.write( "=\"2%2A%285x%2B3%29+%2B+2%2A%283x-2%29\"
\n" ); document.write( "=\"16x%2B2\" -----------(i)
\n" ); document.write( "And Area = \"l%2Ab\"
\n" ); document.write( "=\"%285x%2B3%29%2A%283x-2%29\"
\n" ); document.write( "=\"15x%5E2-x-6\"---------------(ii)
\n" ); document.write( "If area = 230 ,then
\n" ); document.write( "\"15x%5E2-x-6+=+230\"
\n" ); document.write( "=> \"15x%5E2-x-236+=+0\"
\n" ); document.write( "=> \"x=4\" (x can't be neagative since breadth will become negative.
\n" ); document.write( "So the perimeter = 16*4+2
\n" ); document.write( "= 66 cms
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