Is x^2 + y^2 > 100 ?
1) 2xy < 100
2) (x + y)^2 > 200
OAC
I plugged in numbers. Anyone can explain why B is wrong? I tried plugging in.. is it the best method here? Any set of numbers that will prove it insufficient?
Thanks
x2 + y2 vs (x +y)2
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- rohit_gmat
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You are correct, the OA for that question is actually B.rohit_gmat wrote:Is x^2 + y^2 > 100 ?
1) 2xy < 100
2) (x + y)^2 > 200
OAC
I plugged in numbers. Anyone can explain why B is wrong? I tried plugging in.. is it the best method here? Any set of numbers that will prove it insufficient?
Thanks
Please see: https://www.beatthegmat.com/x2-y2-t92678.html
Cheers,
Brent