1. Classify the following numbers as rational or irrational:

(i)     2-\sqrt{5}

Answers (1)

Value of  \sqrt{5}  is  2.23606798....
Now,
\Rightarrow 2 - \sqrt{5} = 2 - 2.23606798... = -0.23606798...
Now,
Since the number is in non-terminating non-recurring. Therefore, it is an irrational number.

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