When 15m is added to two opposite sides of a square and 5m is added to the other sides, the area of the resulting rectangle is 441m^2. How do you find the length of the sides of the original square?
1 Answer
Feb 3, 2016
Length of original sides:
Explanation:
Let
We are told
Therefore
Applying the quadratic formula:
(with a bit of arithmetic)
we get:
but since the length of a side must be
only