Question

5 / root 7 rationalise the denominator

Answer 1

$\dfrac{5\sqrt{7}}{7}$

Explanation:

To rationalise the denominator of $\dfrac{5}{\sqrt{7}}$, we multiply both the numerator and the denominator by $\sqrt{7}$

$\Rightarrow \dfrac{5\times\sqrt{7}}{\sqrt{7}\times\sqrt{7}}$

$\Rightarrow \dfrac{5\sqrt{7}}{7}$

This is the required rationalised term.