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If x is an integer, then which of the following statements about x^2 - x - 1 is true?
A) It is always odd.
B) It is always even.
C) It is always positive.
D) It is even when x is even and odd when x is odd.
E) It is even when x is odd and odd when x is even.
OA A
Source: Princeton Review
A) It is always odd.
B) It is always even.
C) It is always positive.
D) It is even when x is even and odd when x is odd.
E) It is even when x is odd and odd when x is even.
OA A
Source: Princeton Review
