document.write( "Question 495943: A square has a perimeter of 100 cm and its area is 9x^2 + 12x + 4 cm^2. What is x? \n" ); document.write( "
Algebra.Com's Answer #336275 by nerdybill(7384)![]() ![]() You can put this solution on YOUR website! A square has a perimeter of 100 cm and its area is 9x^2 + 12x + 4 cm^2. What is x? \n" ); document.write( "Since the perimeter is 100 cm \n" ); document.write( "each side is 100/4 = 24 cm \n" ); document.write( ". \n" ); document.write( "area = 24^2 \n" ); document.write( ". \n" ); document.write( "24^2 = 9x^2 + 12x + 4 \n" ); document.write( "576 = 9x^2 + 12x + 4 \n" ); document.write( "0 = 9x^2 + 12x - 572 \n" ); document.write( "apply quadratic formula to get: \n" ); document.write( "x = {7.33, -8.67} \n" ); document.write( "we can toss out the negative solution leaving: \n" ); document.write( "x = 7.33 \n" ); document.write( ". \n" ); document.write( "details of quadratic follows: \n" ); document.write( "
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