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Slide 2

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Rationalise the denominator…read more

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Why rationalise?…read more

Slide 4

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Expressions with surds in the denominator
can be difficult to work with…read more

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Multiply top and bottom by…read more

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i.e. reverse the sign of the term…read more

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Comments

daviesg

A simple, clear example of rationalising the denominator.  Note that the word 'rationalise' means make into a rational number from the same stem as 'ratio'.  The process requires you to eliminate all surds from the denominator.

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