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Source: — Data Sufficiency |
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by force5 » Sun Apr 10, 2011 5:18 am
IMO- c
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by vineeshp » Sun Apr 10, 2011 5:22 am
1) xy = y^2
xy - y^2 = 0 --> y (x-y) = 0.
y =0 or x=y.
NS.
If y =0, x can take any number.

2) x^2 = y^2
x =3, y=-3.
NS.

Combined.
From 1,
y =0 or x=y
If y=0, then x also equals 0 as x^2 = y^2. x=y
otherwise x =y.

So C
Vineesh,
Just telling you what I know and think. I am not the expert. :)
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