document.write( "Question 1075802: the width of a rectangle is x centimetres the length of a diagonal of the rectangel is 12 cm. the perimeter of the rectangle is 28cm. fine the value of x . give your values correct to 3 significant figures.
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Algebra.Com's Answer #690436 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
Length is \"sqrt%2812%5E2-x%5E2%29\" from Pythagorean Theorem formula.\r
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\n" ); document.write( "\n" ); document.write( "If L is length,
\n" ); document.write( "\"2L%2B2x=28\"
\n" ); document.write( "\"L%2Bx=14\"
\n" ); document.write( "\"L=14-x\"
\n" ); document.write( "Find L^2.
\n" ); document.write( "\"L%5E2=14%5E2-28x%2Bx%5E2\"\r
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\n" ); document.write( "\n" ); document.write( "\"L%5E2=144-x%5E2\"\r
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\n" ); document.write( "\n" ); document.write( "Equate the two expressions of L^2.
\n" ); document.write( "\"x%5E2-28x%2B196=-x%5E2%2B144\"\r
\n" ); document.write( "\n" ); document.write( "\"2x%5E2-28x%2B196-144=0\"\r
\n" ); document.write( "\n" ); document.write( "\"x%5E2-14x%2B26=0\"\r
\n" ); document.write( "\n" ); document.write( "you can finish from here.
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