SOLUTION: If sides of a square are lengthened by 8 centimeters, the area becomes 144 cm. Find the length of a side of the original square

Algebra ->  Surface-area -> SOLUTION: If sides of a square are lengthened by 8 centimeters, the area becomes 144 cm. Find the length of a side of the original square      Log On


   



Question 156906: If sides of a square are lengthened by 8 centimeters, the area becomes 144 cm. Find the length of a side of the original square
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
(x+8)^2=144 taking the sqrt of both sides we get:
x+8=sqrt144
x+8=12
x=12-8
x=4 cm for the original sides of the square.
Proof:
(4+8)^2=144
12^2=144
144=144