SOLUTION: the length of each side of a square is extended 4 cm. The area of the resulting square is 144 cm^2. Find the length of a side of the original square

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Question 437130: the length of each side of a square is extended 4 cm. The area of the resulting square is 144 cm^2. Find the length of a side of the original square
Answer by htmentor(1343) About Me  (Show Source):
You can put this solution on YOUR website!
Let x = the original side length
Then x+4 = the new length
The new area = 144 = (x+4)^2
Taking the square root of both sides gives
12 = x+4
So x = 8 cm