SOLUTION: If the sides of a square are lengthened by 7 cm, the area becomes 121 cm^2. find the length of a side of the original square
Algebra ->
Equations
-> SOLUTION: If the sides of a square are lengthened by 7 cm, the area becomes 121 cm^2. find the length of a side of the original square
Log On
Question 438184: If the sides of a square are lengthened by 7 cm, the area becomes 121 cm^2. find the length of a side of the original square Answer by jorel1380(3719) (Show Source):
You can put this solution on YOUR website! (x+7)(x+7)=121
x2+14x+49=121
x2+14x-72=0
(x+18)(x-4)=0
Throwing away the negative answer, we get x=4..
