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 #233019 by checkley77(12844) $\"\"$ $\"About$

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(X+8)^2=225
\n" ); document.write( "X^2+16X+64-225=0
\n" ); document.write( "X^2+16X-161=0
\n" ); document.write( "(X=23)(X-7)=0
\n" ); document.write( "X-7=0
\n" ); document.write( "X=7 cm. was the original square sides.
\n" ); document.write( "Proof:
\n" ); document.write( "(7+8)^2=225
\n" ); document.write( "15^2=225
\n" ); document.write( "225=225 \n" ); document.write( "

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