Question

Rationalize the denominator of the fraction below. What is the newdenominator?

Answer 1

To rationalize the denominator we have to multiply it by the conjugate, as follows:

`(3+√(6))(3-√(6))=3^2-(√(6)\rparen^2`

The latter considering the property (a-b)(a+b)=a^2-b^2.

Finally we have:

`3^2-6=9-6=3`

The the answer is D. 3