SOLUTION: If the sides of a square are lengthened by 7cm, the area becomes {{{169cm^2}}}. Find the length of a side of the original square. The length of a side of the original square ___

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: If the sides of a square are lengthened by 7cm, the area becomes {{{169cm^2}}}. Find the length of a side of the original square. The length of a side of the original square ___      Log On


   

Question 282576: If the sides of a square are lengthened by 7cm, the area becomes 169cm%5E2. Find the length of a side of the original square.
The length of a side of the original square ____cm
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
(x+7)^2=169
we are dealing with length so we need real roots
x+7=13
x=6
check
(6+7)^2=169
ok