Question

Rationalise the denominator of `4/sqrt(2)`.

Answer 1

To rationalise the denominator of `4/sqrt(2)`

Multiply numerator and denominator by `sqrt(2)`:

`4/sqrt(2) xx sqrt(2)/sqrt(2) = (4sqrt(2))/2`

Now simplify:

`(4sqrt(2))/2 = 2sqrt(2)`