Question

In rationalisation, a number which when multiplied with an irrational number to get a rational denominator is called:

• A. Radicands
• B. Rationalising factor
• C. Conjugate
• D. None of the above

Answer 1

The correct option is B Rationalising factor

To make the denominator a rational number, we multiply both numerator and denominator with the conjugate surd (of the denominator) which is also called rationalising factor.

And this process is called rationalisation.