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Quantitative Aptitude ( CCS)

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[2√392 – 21] + (√8-7)² = ?²

8

6

9

11

Explanation:

[2√392 – 21] + (√8-7)² = x²
[2 √49*8 -21] + 8+ 49 -14√8= x²
14√8 -21 +57 -14√8= x²
x²=36
x=6.

Hence, option 2 is the correct answer.

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