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28 Sep 2022, 02:14
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B
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Difficulty:
5%
(low)
Question Stats:
83% (00:26) correct
17%
(01:06)
wrong
based on 126
sessions
History
Date
Time
Result
Not Attempted Yet
(√2 + √3)(√2 −√3) =
(A) −√6
(B) −1
(C) 1
(D) √5
(E) 5
(A) −√6
(B) −1
(C) 1
(D) √5
(E) 5
Part of the project: GMAT DS & PS DAILY Challenge - [TOPIC WISE] (2022) - Gain 25 Kudos & Get FREE Access to GMATClub TESTS
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GMAT - Math Book
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
GMAT - Math Book
Ultimate GMAT Quantitative Megathread
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ALL GMAT PREP PS + DS QUESTIONS (LINKS TO ALL 825 QUESTIONS)
28 Sep 2022, 08:08
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We need to find the value of (√2 + √3)(√2 −√3)
(√2 + √3)(√2 −√3) is of the form (a+b) * (a-b) and we know that (a+b) * (a-b) = \(a^2 - b^2\)
=> (√2 + √3)(√2 −√3) = \(√2^2 - √3^2\) = 2 - 3 = -1
So, Answer will be B
Hope it helps!
(√2 + √3)(√2 −√3) is of the form (a+b) * (a-b) and we know that (a+b) * (a-b) = \(a^2 - b^2\)
=> (√2 + √3)(√2 −√3) = \(√2^2 - √3^2\) = 2 - 3 = -1
So, Answer will be B
Hope it helps!
24 Jan 2026, 14:42
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