document.write( "Question 132153: Totally confused. Please help\r
\n" ); document.write( "\n" ); document.write( "If the sides of a square are lengthened by 7cm, the are becomes 225cm^2. Find the length of a side of the original square.\r
\n" ); document.write( "\n" ); document.write( "Yje length of a side of the original square is ____cm.
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Algebra.Com's Answer #96543 by rapaljer(4671)\"\" \"About 
You can put this solution on YOUR website!
\"%28x%2B7%29%5E2=225\"\r
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\n" ); document.write( "\n" ); document.write( "Take the square root of each side:
\n" ); document.write( "\"x%2B7=15\" or \"x%2B7=-15\"\r
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\n" ); document.write( "\n" ); document.write( "Reject the second case, since the side of a square must be positive!\r
\n" ); document.write( "\n" ); document.write( "\"x=8\" cm\r
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\n" ); document.write( "\n" ); document.write( "R^2
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