Question

2. If x © y= (x+y) ^2/(x-y) ^2 then which of the following equals 1?
A. 1© -1 B. 2©1 C. 2©2 D. -1©0 E.none of these

Answer 1

Just plugging in the values of x and y, D.:
(-1 + 0)^2 = 1
(-1 - 0)^2 = 1
1/1 = 1

Answer 2

So the answer is D .Is it right

Answer 3

I think yeah, but wait for a second opinion.