SOLUTION: If the sides of a square are lengthened by 4cm, the area becomes 256 square cm. Find the length of a side of the original square. Thank you

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Question 39813: If the sides of a square are lengthened by 4cm, the area becomes 256 square cm. Find the length of a side of the original square.
Thank you
Answer by fractalier(2101) About Me  (Show Source):
You can put this solution on YOUR website!
Let the original side be x.
Then (x+4)^2 = 256
Take the square root of both sides...
x+4 = 16
x = 12 cm