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Lesson on Rationalization of surds

Answer Text:
Rationalization of Surds
-To rationalize a surd is to make a surd become a rational number. This is achieved by multiplying the surd by its conjugate.
- The conjugate of `sqrt a` is `sqrt a` while the conjugate of `sqrt b` is `sqrt b` .
-For the complex surds, we change the sign between the surds. e.g the conjugate of `sqrt a + sqrt b` is `sqrt a - sqrt b` and vice versa.
Example 1. Rationalize the following surds.
a).`sqrt 5` b). `sqrt 3`