Rationalising the Denominator and Simplifying Surds
Typical surd expressions take the form
To simplify an expression like this we multiply numerator (top) and denominator (bottom) by the conjugate root of the bottom. In this case the conjugate root is
The ontain an expression of the form
over d where
are whole numbers in all these equations.
Example:
Rationalise the denominator and simplify:
Example:
Rationalise the denominator and simplify:
