If xy not equal 0 and x^2*y^2 -xy = 6, which of the following could be y in terms of x?
I. 1/2x
II. -2/x
III. 3/x Choices.
A) I only
B) II only
C) I and II
D) I and III
E) II and III
(xy)^2-xy-6=0   (xy-3)(xy+2)=0   so either xy=3 i.e. y=3/x   or xy=-2 i.e. y=-2/x   so II and III is the ans
<result>E</result>
If xy not equal 0 and x^2*y^2 -xy = 6, which of the following could be y in terms of x?
I. 1/2x
II. -2/x
III. 3/x