How To Rationalise The Denominator?

If the denominator is a single surd, multiply the numerator and denominator by the same surd

If the denominator is a binomial with a surd, multiply by the conjugate of the denominator

Use the identity ((a+b)(a-b)=a^2-b^2) to remove the surd from the denominator

Simplify the resulting fraction

Cancel any common factors if possible

If the denominator contains more than one surd term, choose a factor that makes the denominator a rational expression when expanded

Expand and simplify until no surds remain in the denominator

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