document.write( "Question 824351: If each side of a square is increased by 3cm , its area is increased by 45cm^2. Find the length of a side of the original square. \n" ); document.write( "
Algebra.Com's Answer #496352 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
(x+3)^2 = x^2 + 45\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "x^2 + 6x + 9 = x^2 + 45\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "x^2 + 6x + 9 - x^2 = 45\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "6x + 9 = 45\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "6x = 45 - 9\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "6x = 36\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "x = 36/6\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "x = 6\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "The side length of the original square is 6 cm
\n" ); document.write( "
\n" );