If x = 3y, is x^2 > y^2?
(1) y+x < yx
(2) x^2 = 9y^2
Sol: Subsitute for x and we need to know whether 8y^2> 0
Or whether y is equal to zero or not
From st 1 we see that 4y<3y^2 or y*(3y-4) >0
We see that either y>0 and y>4/3 or y<0 or y< 4/3
This implies y not equal to zero hence thenl statement is suff.
St2 is same info as given in the question stem
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