Question 910759: If each side of a square are lengthened by by 5 cm, the area becomes 144 cm ^2. Find the length of the side of the original square. Answer by ewatrrr(24785) (Show Source):
You can put this solution on YOUR website! Asquare = s^2 where s is the length of the side of the original square
(s+5)(s+5) = 144cm^2
s^2 + 10x + 25 = 144
s^2 + 10x - 119 = 0 (Tossing out the negative solution for unit measure)
(x+17)(x-7) = 0
s = 7cm, the length of the side of the original square
