x^2*y + x*y^2 < 04meonly wrote:x^2*y + x*y^2 < 0?
(1) xy<0
(2) x<0
--> xy (x+y)<0
(1) xy<0
x+y can be -ve or +ve
x=2 y=-3 --> -ve
x=-2 y=3 --> +ve
not sufficient
(2)
x<0
we don't the value of y.
x^2*y + x*y^2 < 0 or >0
not sufficient
combined
x<0 y>0
xy (x+y)<0
x=-2 y=3 xy (x+y)>0
x=-3 y=2 xy (x+y)<0
Not sufficient
E.
