Given that (x+y)^2<x^2, Which of the following can be true?
I xy<0 II y(2x+y)<0 III x<0
The OA says that I and II are right. But I found a case where I does not
hold. Try putting x=3 and y=-6
xy=18 is less than zero
but (x+y)^2 = 9
x^2 = 9
Hence condition (x+y)^2<x^2 fails because they are equal
I xy<0 II y(2x+y)<0 III x<0
The OA says that I and II are right. But I found a case where I does not
hold. Try putting x=3 and y=-6
xy=18 is less than zero
but (x+y)^2 = 9
x^2 = 9
Hence condition (x+y)^2<x^2 fails because they are equal
