If xy not equal 0 and x^2*y^2 -xy = 42, which of the following could be y in terms of x?
I. 1/2x
II. -7/x
III. 6/x Choose the correct choice from the following answers:
A) II  B) III  C) IV  D) II and III  E) I &II
x2y2 â€“ xy = 6   x2y2-xy-42 = 0   (xy-6)(xy+7)=0   xy = 6 or xy=-7   y = 6/x or y = -7/x   II and III only   II and III
<result>D</result>
If xy not equal 0 and x^2*y^2 -xy = 42, which of the following could be y in terms of x?
I. 1/2x
II. -7/x
III. 6/x