document.write( "Question 1084031: I need to solve the problem in this link please \r
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Algebra.Com's Answer #698104 by ikleyn(52903) $\"\"$ $\"About$

You can put this solution on YOUR website!
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document.write( "The length of the rectangle is 2x (from -x to +x). It is \"horizontal\" dimension.\r\n" );
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document.write( "The height of the rectangle is f(x) = . It is \"vertical\" dimension.\r\n" );
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document.write( "The area of the rectangle is  A(x) =  = .\r\n" );
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document.write( "To find the maximum, take the derivative and equate it to zero:\r\n" );
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document.write( " = 16 - 12x^2 = 0.\r\n" );
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document.write( "====>   =   ====>  x =  =  = .\r\n" );
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document.write( "You calculate maximal area A(x) by substituting x = .\r\n" );
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\n" ); document.write( "\n" ); document.write( " $\"graph%28+330%2C+330%2C+-2.5%2C+5.5%2C+-12.5%2C+15.5%2C%0D%0A++++++++++16x+-+4x%5E3%0D%0A%29\"$ \r
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\n" ); document.write( "\n" ); document.write( "Plot A(x) = $\"16x+-+4x%5E3\"$ \r
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