Question

Rationalise the denominator of `10/sqrt(5)`.

Answer 1

To rationalise the denominator of `10/sqrt(5)`

Multiply numerator and denominator by `sqrt(5)`:

`10/sqrt(5) xx sqrt(5)/sqrt(5) = (10sqrt(5))/5`

Now simplify:

`(10sqrt(5))/5 = 2sqrt(5)`