If X not equal to –Y; is X-Y/X+Y>1

[shobuj40]

If X not equal to -Y; is X-Y/X+Y>1
A. X>0
B. Y<0

Ans: E

[shobuj40]

question?

When we can multiply both side of an inequality please explain with example?

Thanks in advance.

[RonPurewal]

read this, which, coincidentally, is posted on a thread about this very problem.

the rule is simple, actually:
* if you multiply an inequality by a POSITIVE NUMBER on both sides, you change nothing about the inequality sign.
* if you multiply an inequality by a NEGATIVE NUMBER on both sides, you flip the inequality sign (i.e., "<" becomes ">" & vice versa, and "<" becomes ">" & vice versa).

if you don't know the sign of the quantity by which you're multiplying, then you can't do it at all, because of the consequences of these principles: you simply don't know what should happen to the inequality sign.