If x≠y and x·y≠0, which of the following may be true?  Answers:
A) x/y=−y/x	B) x^2=−y^2	C) (x−y)^2<0	D) x−y=y−x	E) (x+y)(x−y)=0
Answer:	A and B are effectively the same i.e x^2+y^2=0   C square can't be less than 0   D give x = y refuted is question stem   (x+y)(x−y)=0
<result>E</result>
If x≠y and x·y≠0, which of the following may be true?