RRB NTPC Mains or Stage 2 Model Paper 6 with solutions

Question : 2 of 119

Marks: +1, -0

What is the square root of 9 + 2 14 ?

Solution:

(c)

9 + 2 √14 =(√ 7)^2 +(√ 2) ^2+ 2 √7 × 2

= ( √7+√2)^2

∴ √{9 + 2 √{14}} = ( √7 + √2 )

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