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# gmat prep

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Intern
Joined: 26 Jan 2009
Posts: 23

Kudos [?]: 2 [0], given: 0

Schools: University of Toronto, Schulich, Western, Queens

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11 Apr 2009, 16:14
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i've been working on this for more than 10 minutes....it's driving me crazy...someone help please
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Kudos [?]: 2 [0], given: 0

Manager
Joined: 05 Jan 2009
Posts: 80

Kudos [?]: 160 [0], given: 2

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11 Apr 2009, 16:23
ANS:20.
(a+b)^2=a^2+b^2+2ab.

9+80^0.5+9-80^0.5+2(9^2-80)=18+2=20.

Kudos [?]: 160 [0], given: 2

Re: gmat prep   [#permalink] 11 Apr 2009, 16:23
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