If xy ≠ 0 and x^2y^2 − xy = 20, which of the following could be y in terms of x?
I. 5/x
II. -4/x
III. 3/x	Choose the correct choice from the following.
A) I only B) II only C) I and II only D) I and III E) II and III
(x^2)(y^2) – xy - 20 = 0   (xy – 5)(xy + 4) = 0   xy – 5 = 0 or xy + 4 = 0   xy = 5 or xy = -4   Since we need y in terms of x, we can isolate y in both of our equations.   y = 5/x or y = -4/x   Answer: I and II only
<result>C</result>
If xy ≠ 0 and x^2y^2 − xy = 20, which of the following could be y in terms of x?
I. 5/x
II. -4/x
III. 3/x