Is XY0? Stmt 1: (x-y)^2 = 8 Stmt 2: (x-y)^2 = 10 Any

Question

Is XY>0?

Stmt 1: (x-y)^2 = 8

Stmt 2: (x-y)^2 = 10

Any ideas on how to solve this? Thanks for your help!

sgrover · Answer

Is one of them (x+y)^2 ??

Dallas Jockey · Answer

No, both are (x-y)^2. This is from a reputed online GMAT test, so i doubt if the question is incorrect......I can't rule out their typos though...

paddyboy · Answer

Hmm... so we can rule out C at the outset. A and B can be ruled out, IMO, they do not give us any info. And by extension, D as well. Remaining is E. :?:

Raghavender · Answer

Yea luks E is the only choice, where I can seek shelter. 

Wats the OA

shahnandan · Answer

same here I get E.

however, I fail to understand how both can be (x+y)^2

ywilfred · Answer

St1:

(x-y)^2 = 8
(x-y) = +/- sqrt(8)

Can be x positive and y negative, or x negative and y negative. Insufficient.

St2:
(x-y)^2 = 10

Same thing as St1.

Impossible to use both St1 and St2 since they (x-y)^2 actually ended up with two values.

I'm going with E. But I have to say this question is definitely incorrect. To my knowledge, GMAT DS stems do not have conflicting statements.

buzzgaurav · Answer

The only plausible solution seems to be E.

Is XY>0? Stmt 1: (x-y)^2 = 8 Stmt 2: (x-y)^2 = 10 Any

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