MathematicsThe rationalisation factor of 2+3 is ____.

The rationalisation factor of $2 + \sqrt{3}$ is ____.

The rationalisation factor of

2 + \sqrt{3}

2 - \sqrt{3}

.
Given,

2 + \sqrt{3}

.
A rationalising factor is the factor of multiplication used to perform rationalisation.
Rationalising factor of

a + \sqrt{b} = a - \sqrt{b}

.
So, the rationalising factor of

2 + \sqrt{3} = 2 - \sqrt{3}

.
Hence the correct answer is

2 - \sqrt{3}

JEE