Hi,
the difference between the squares of two consecutive integers is 133.
Let x and (x+1) represent the two consecutive integers
Question states***
(x +1)^2 - x^2 = 133
x^2+2x+1-x^2 = 133
2x+1 = 133
2x = 132
x = 66 | Integers are 66,67
CHECKING our Answer***
4489 - 4356 = 133