GRE Sample Test 2 Quantitative Reasoning 1

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Question : 12 of 20

Marks: +1, -0

(√5-√3)^2

=

$2-2√{15}$
$2-√{15}$
$8-2√{15}$
2
$8-2√{5}$

Solution:

For this question, you can FOIL:

(√5)^2-(√3√5)

-

(√5)(√3)+(√3)^2

.
This simplifies to

5-2√{15}

or 8 -

2√{15}

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