Write the rationalisation factor of `sqrt(5)-\ 2`

Explanation

To find the rationalization factor of \( \sqrt{5} - 2 \), we need to follow these steps:

### Step 1: Identify the expression
We have the expression \( \sqrt{5} - 2 \).

### Step 2: Write the rationalization factor
The rationalization factor of an expression of the form \( a - b \) is \( a + b \). In our case, \( a = \sqrt{5} \) and \( b = 2 \). Therefore, the rationalization factor is:

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