SOLUTION: if two sides of a square are increased by five feet, the area of the field would be increased by 245 ft. find the area of the original square?

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Question 215377: if two sides of a square are increased by five feet, the area of the field would be increased by 245 ft. find the area of the original square?

Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
x*x=x^2
(x+5)^2=x^2+245
x^2+10x+25=x^2+245
10x=245-25
10x=220
x=220/10
x=22 is the size of the original square.
Proof:
22^2=484
(22+5)^2=22^2+245
27^2=484+245
729=729