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Square Root Question????

Problem Solving — algebra and arithmetic (GMAT Focus Edition)
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Source: — Quantitative Reasoning |
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by Neo2000 » Tue May 12, 2009 6:49 pm
Consider this as (2a) x (2a) where a = sqrt2

So you now have 4(a^2)
(sqrt2)^2 = 2
Which means you have 4(2) = 8
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