document.write( "Question 913412: the area of a rectangle is represented by x^2-4. If the perimeter is 40, find x.
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Algebra.Com's Answer #554506 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi,
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document.write( "     .
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document.write( "A = x^2-4
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document.write( "A = Lw = (x-2)(x-2)
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document.write( "P/2 = L + w = 20
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document.write( "(x-2) + (x+2) = 20
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document.write( "2x = 20
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document.write( "x = 10 \n" );
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