Ans would be A
(x+y)^2 = x^2+y^2+2xy ----------(1)
(x-y)^2 = x^2+y^2-2xy ------------(2)
you need to find (1)/(2)
stmt 1 - x^2+y^2 = 3xy
(1) will be 3xy+2xy = 5xy
(2) will be 3xy-2xy = xy
(1)/(2) = 5 SUFF
Stmt 2 - xy= 3. No info to calculate x^2+y^2 so NOT SUFF
Ans A
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