The larger number is 82 and the smaller number is 54.
A. because in A, it flips the two conditions, which can changes the accuracy of the statement.
So since you know that x^2-1 is equal to (x-1)(x+1),
you can figure that this factors to
(y^2-x^3)(y^2+x^3)
because you know how the difference of two squares formula, stated on the top line of this answer.