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(√5 + √2) × (√5 - √2) = ?

This question was previously asked in
NPCIL Assistant Grade-1 (HR/F&A/C&MM/Steno Grade-I) Official Paper-II (Held In: 2022)
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  1. 10
  2. 7
  3. 3
  4. √3

Answer (Detailed Solution Below)

Option 3 : 3
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Detailed Solution

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Given:

(√5 + √2) × (√5 - √2) = ?

Formula used:

(a + b) × (a - b) = a2 - b2

Calculation:

(√5 + √2) × (√5 - √2) = (√5)2 - (√2)2

⇒ 5 - 2

⇒ 3

∴ The correct answer is option 3.

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Latest NPCIL Assistant Grade 1 Updates

Last updated on Mar 21, 2025

-> Nuclear Power Corporation of India Limited has published a comprehensive notification for the position of NPCIL Assistant Grade 1.

-> A total of 37 vacancies has been announced for the post of NPCIL Assistant Grade 1. Bookmark this page for all the latest updates.

-> Interested applicants can start submitting their online applications from 12 March 2025.

-> The application window will be closed on 1 April 2025. However the date of exam is yet to be notified.

-> Candidates can review the NPCIL Assistant Grade 1 Previous Year Papers, for better preparation!

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