176 another inequalities with ds

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ern5231: Master | Next Rank: 500 Posts; Posts: 226; Joined: Sun Aug 09, 2009 4:34 am

176 another inequalities with ds

by ern5231 » Wed Oct 07, 2009 5:04 pm

Is a^2-ab<0?

1) b<0
2)ab<0

The OA given is E but I feel it should be B.

It is given that ab<0. Hence a^2-(-ve)=>a^2+... which is positive. Hence >0 and should be sufficient. What is you opinion?

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Source: Beat The GMAT — Data Sufficiency | Wed Oct 07, 2009 5:04 pm

sunnyjohn: Master | Next Rank: 500 Posts; Posts: 344; Joined: Mon Sep 14, 2009 5:40 am; Thanked: 28 times; Followed by:3 members; GMAT Score:700

by sunnyjohn » Wed Oct 07, 2009 6:25 pm

yup...I agree the OA should be B.

what is the OA explanation?

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