Surd

Surds:

√2, √3, √5, √21, ................ are irrational numbers, These are square roots (second roots), of some rational numbers, which can not be written as squares of any rational number.

If a is rational number and n is a positive integer such that the n^th root of a is an irrational number, then a^1/n is called a surd or radical.
1. Example: √2, √3, √5 etc.

Laws of Radicals:

For any positive integer ‘n’ and a positive rational number ‘a’.

Surd

surd

radicand example

what is a surd