document.write( "Question 1031094: In a room each wall is x feet. If you extend the room by 15 ft each way, the new area of the room is 900 ft. What was the original lengths of the walls? \n" ); document.write( "

Algebra.Com's Answer #645803 by rothauserc(4718) $\"\"$ $\"About$

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(x + 15)^2 = 900
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\n" ); document.write( "x^2 +30x + 225 = 900
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\n" ); document.write( "x^2 +30x - 675 = 0
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\n" ); document.write( "(x-15)*(x+45) = 0
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\n" ); document.write( "x is 15 or -45
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\n" ); document.write( "we reject the negative value
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\n" ); document.write( "original length of the walls was 15 feet
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