Rationalisation of Surds
Rationalisation of Surds
Rationalisation of Surds
If the product of two surds is rational, then each of the surds is called a rationalising factor of the other. In general, if the surd is of type then its rationalising surd is a
.
The rationalising factor of a surd is of a surd is not unique but it is always convenient to use simplest of all rationalising factors.
e.g.,
can be rationalised as follows:
Illustration . The expression equals to.
A. B.
C.
D.
Solution:
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