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# Classify the following numbers as rational or irrational: (i) 2 - square root 5

1. Classify the following numbers as rational or irrational:

(i)     $2-\sqrt{5}$

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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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