\sqrt? -11 = \sqrt1521

Correct Answer is : None of these

RRB NTPC Mains or Stage 2 Model Paper 10 with solutions

Question : 1 of 120

Marks: +1, -0

√? -11 = √1521

Solution:

(d)

√? -11 = 1521

⇒√ ? -11 = 39

⇒ √? = 39 +11 = 50

∴? = (50)^2 = 2500

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