Bunuel wrote:
Is |x - y| > |x + y|?
(1) x^2 - y^2 = 9
(2) x - y = 2
solve for |x - y| > |x + y|
we get -4xy>0
#1
(x+y)*(x-y)=9
insufficient
#
x-y=2
x=y+2
insufficient
from 1&2
x+y=9/2
sufficient to say -4xy>0
IMO C
Is |x - y| > |x + y|?
(1) x^2 - y^2 = 9
(2) x - y = 2
solve for |x - y| > |x + y|
we get -4xy>0
#1
(x+y)*(x-y)=9
insufficient
#
x-y=2
x=y+2
insufficient
from 1&2
x+y=9/2
sufficient to say -4xy>0
IMO C
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