document.write( "Question 325398: if the sides of a square are lenghtened by 8cm, the area becomes 225cm².Find the lenght of a side of the original square \n" ); document.write( "

Algebra.Com's Answer #233026 by Edwin McCravy(20059) $\"\"$ $\"About$

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document.write( "We start with this square which has sides the unknown x:\r\n" );
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document.write( "Now let's add 8 cm to each side:\r\n" );
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document.write( "Now each side of the big square has length of side x plus the 8cm\r\n" );
document.write( "we have added on.\r\n" );
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document.write( "So each side of the big square is x+8 cm.\r\n" );
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document.write( "Now we use the formula for the area of a square:\r\n" );
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document.write( "We are told \r\n" );
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document.write( ">>...area becomes 225cm²...<<\r\n" );
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document.write( "So we substitute 225 for A and (x+8) for \"one side\"\r\n" );
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document.write( "Take square roots of both side:\r\n" );
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document.write( "So each side of the original square had length 7 cm.\r\n" );
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document.write( "Edwin

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