<p>Rationalising rewrites a fraction with an irrational radical denominator so that the denominator is rational. For a two-term radical denominator, multiply both numerator and denominator by its non-zero conjugate.</p>
<p>\( \frac{3}{5 + \sqrt{2}} \times \frac{5 - \sqrt{2}}{5 - \sqrt{2}} \)</p>

Rationalising rewrites a fraction with an irrational radical denominator so that the denominator is rational. For a two-term radical denominator, multiply both numerator and denominator by its non-zero conjugate.

\( \frac{3}{5 + \sqrt{2}} \times \frac{5 - \sqrt{2}}{5 - \sqrt{2}} \)

Rationalising the Denominator

Rationalising the Denominator