SOLUTION: the number of square feet in the area of a square is 5 more than the number of feet in the perimeter of the square. Find the lentgh of a side.

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Question 15785: the number of square feet in the area of a square is 5 more than the number of feet in the perimeter of the square. Find the lentgh of a side.
Answer by 303795(595) About Me  (Show Source):
You can put this solution on YOUR website!
If the square has a side length of x then the area will be x%5E2 and the perimeter will be 4x.
So 4x%2B5+=+x%5E2
x%5E2-4x-5=0
(x-5)(x+1)=0 so the side length could be 5 or -1.
Only a side length of 5 feet makes sense in the context of the problem.